fleur.F90 39 KB
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      MODULE m_fleur
      IMPLICIT NONE
      CONTAINS
        SUBROUTINE fleur_execute(mpi_comm)

          !     ***************************************************************
          !
          !     based on flapw7 (c.l.fu, m.weinert, e.wimmer):
          !     full potential linearized augmented plane wave method for thin
          !     films and superlattices (version 7 ---- general symmetry)
          !     symmetry part       ---  e.wimmer
          !     potential generator ---  c.l.fu,r.podloucky
          !     matrix elements     ---  m.weinert
          !     charge density      ---  c.l.fu
          !                                c.l.fu        1987
          !     2nd variation diagon.  --- r.-q. wu      1992
          !     forces a la Yu et al   --- r.podloucky   1995
          !     full relativistic core --- a.shick       1996
          !     broyden mixing         --- r.pentcheva   1996
          !     gga (pw91, pbe)        --- t.asada       1997
          !     local orbitals         --- p.kurz        1997
          !     automatic symmetry     --- w.hofer       1997
          !     core tails & start     --- r.abt         1998
          !     spin orbit coupling    --- a.shick,x.nie 1998
          !     non-colinear magnet.   --- p.kurz        1999
          !     one-dimensional        --- y.mokrousov   2002 
          !     exchange parameters    --- m.lezaic      2004 
          !     
          !                       g.bihlmayer, s.bluegel 1999
          !     ***************************************************************
          !----------------------------------------
          ! this routine is the main PROGRAM
          !
          ! flapw --+-- dimens      ... dimensioning routine(s)
          !         +-- inped - rw_inp
          !         +-- setup       ... readin & setup
          !         +-- optional    ... plots, startdensity etc.
          !        +-+
          !        | +-- vgen       ... construct potential
          !        | +-- eigen      ... calculate eigenvalues & vectors
          !        |(+-- eigenso)       ... spin orbit coupling
          !        | +-- fermie     ... calculate fermi energy
          !        |(+-- force0)        ... initialize force
          !        | +-- cdngen     ... construct charge density
          !        |(+-- vgen)          ... output potential
          !        |(+-- potdis)        ... potential distance
          !        | +-- totale     ... calculate total energy
          !        | +-- mix        ... mix densities
          !        +-+
          !----------------------------------------
          !
          ! I/O file list 
          !        2... time.info ...
          !        5... inp       ...
          !        6... out       ...
          !        8... pottot    ...
          !        9... nrp       ...
          !       11... potcoul   ...
          !       14... wkf2      ...
          !       15... QGpsi,CLASS,NLAindx,SYMOPS,LATTC,gwa,abcoeff,ecore
          !       16... inf       ...
          !       17... cdnc      ...
          !       18... plotin    ...
          !       19... cdnout    ...
          !       20... cdn_slice ...
          !       22... dirofmag  ...
          !       24... nocoinf   ...
          !       25... potmat    ...
          !       26... rhomat_inp & rhomat_out 
          !       28... tmat      ...
          !       29... tlst      ...
          !       38... tmas      ...
          !       40... enpara    ...
          !       41... kpts      ...
          !       43... force.dat ...
          !       45... inp_new   ...
          !       51... stars     ...
          !       57... broyd     ...
          !       59... broyd.x   ...
          !       66... eig       ...
          !       67... eig.soc   ...
          !       71... cdn1      ...
          !       79... cdn9      ...
          !       85... dosinp    ...
          !       86... vacdos    ...
          !       87... tmp_vacdos ...
          !       88... vacwave   ...
          !       92... CBS_eigenvalues.1/2
          !       93... CBS_states
          !       99... qfix      ...
          !      101... Smat...
          !      102... Tmat..
          !      110... scratch unit for GW
          !      113... qpts      ...
          !      114... jenerg    ...
          !      115... jconst    ...
          !      116... qptsinfo  ...
          !      117... shells    ...
          !      118... MCinp     ...
          !      300... matelsso  (for ss+soc) 
          !      301+XXX matelXXX (for ss+soc)
          !
          !----------------------------------------
          USE m_types
          USE m_fleur_init
          USE m_pldngen
          USE m_optional
          USE m_vgen 
          USE m_rhodirgen
          USE m_writexcstuff
          USE m_vmatgen
          USE icorrkeys
          USE m_eigen
          USE m_eigenso
          USE m_fermie
          USE m_force0
          USE m_cdngen
          USE m_totale
          USE m_potdis
          USE m_mix
!          USE m_jcoff
!          USE m_jcoff2
!          USE m_ssomat
#ifdef CPP_WANN
          USE m_wann_optional
          USE m_wannier
#endif
!          USE m_mixedbasis
!          USE m_coulomb
          USE m_gen_map
          USE m_dwigner
          USE m_gen_bz
!          USE m_generate_pntgpt
!          USE m_rotate_eig
          USE m_ylm
#ifdef CPP_MPI
          USE m_mpi_bc_all,  ONLY : mpi_bc_all
#endif
          USE m_eig66_io,   ONLY : open_eig, close_eig
          IMPLICIT NONE

          INTEGER,INTENT(IN) :: mpi_comm
          !
          !
          !     scalar bmu changed to array bmu(ntypd) to enable calculation of
          !     both ferromagnetic and antiferromagnetic CASE - r.pentcheva Jan'96
          !     another possibility for the antiferromagnetic case ist to start
          !     from the ferromagnetic charge density and flip the magnetic moment
          !     of certain atoms: logical variable lflip and integer nflip(ntype)
          !                                 r.pentcheva,kfa,Feb'96
          !     .. Parameters ..
          !     ..
          !     Types, these variables contain a lot of data!
          TYPE(t_input)    :: input
          TYPE(t_dimension):: dimension
          TYPE(t_atoms)    :: atoms
          TYPE(t_sphhar)   :: sphhar
          TYPE(t_cell)     :: cell
          TYPE(t_stars)    :: stars
          TYPE(t_sym)      :: sym
          TYPE(t_noco)     :: noco
          TYPE(t_vacuum)   :: vacuum
          TYPE(t_sliceplot):: sliceplot
          TYPE(t_banddos)  :: banddos
          TYPE(t_obsolete) :: obsolete 
          TYPE(t_enpara)   :: enpara
          TYPE(t_xcpot)    :: xcpot
          TYPE(t_results)  :: results
          TYPE(t_jij)      :: jij
          TYPE(t_kpts)     :: kpts
          TYPE(t_hybrid)   :: hybrid
          TYPE(t_oneD)     :: oneD
          TYPE(t_mpi)      :: mpi


          !     .. Local Scalars ..
          INTEGER:: eig_id
          INTEGER:: i,it,ithf,jspin,n           
          LOGICAL:: stop80,reap,l_endit,l_opti,l_cont
          CHARACTER(len=9) ivers
          CHARACTER(len=12) fname(3)
          !--- J<
          INTEGER             :: phn  
          REAL, PARAMETER     :: tol = 1.e-8 
          INTEGER             :: qcount ,imt,i_J,j_J
          !--- J>

          !     ..
          !     .. Local Arrays ..
          CHARACTER(8) name(10)

          !     HF/hybrid-functionals/EXX
          INTEGER               ::  l,j,m1,m2,isym,iisym
          INTEGER               ::  ok
          LOGICAL               ::  l_restart
          COMPLEX               ::  cdum
          ivers    = 'fleur 27'
          mpi%mpi_comm=mpi_comm
         CALL fleur_init(ivers,mpi,input,dimension,atoms,sphhar,cell,stars,sym,noco,vacuum,&
                 sliceplot,banddos,obsolete,enpara,xcpot,results,jij,kpts,hybrid,&
                 oneD,l_opti)
 
         IF (l_opti) THEN
             IF (sliceplot%iplot .AND. (mpi%irank==0) ) THEN
                IF (noco%l_noco) THEN
                   CALL pldngen(&
                        &      sym,stars,atoms,sphhar,vacuum,&
                        &      cell,input,noco,oneD,sliceplot)
                ENDIF
             ENDIF
             CALL OPTIONAL(&
                  &    mpi,atoms,sphhar,vacuum,dimension,&
                  &    stars,input,sym,cell,sliceplot,obsolete,&
                  &    xcpot,noco,oneD)
          ENDIF
          !
          IF (sliceplot%iplot)      CALL juDFT_end("density plot o.k.")
          IF (input%strho)          CALL juDFT_end("starting density generated")
          IF (input%swsp)           CALL juDFT_end("spin polarised density generated")
          IF (input%lflip)          CALL juDFT_end("magnetic moments flipped")
          IF (obsolete%l_f2u)       CALL juDFT_end("conversion to unformatted")
          IF (obsolete%l_u2f)       CALL juDFT_end("conversion to formatted")
          IF (input%l_bmt)          CALL juDFT_end('"cdnbmt" written')


#ifdef CPP_WANN
          input%l_wann = .FALSE.
          INQUIRE (file='wann_inp',exist=input%l_wann)
          IF (input%l_wann .AND. (mpi%irank == 0))THEN
             CALL wann_optional(&
                  &                      input,atoms,&
                  &                      sym,cell,oneD,noco)
          ENDIF
#endif
        
          l_restart = .TRUE.
    
          it     = 0
          ithf   = 0
          l_cont = ( it < input%itmax )
          DO 80 WHILE ( l_cont )
             it = it + 1
             !+t3e
             IF (input%alpha.LT.10.0) THEN
                !
                IF (it.GT.1) THEN
                   obsolete%pot8 = .FALSE.
                   input%alpha = input%alpha - NINT(input%alpha)
                END IF
                !
                IF (it.GT.1) THEN
                   obsolete%eig66(1)= .FALSE.
                END IF
                CALL timestart("Iteration")
                IF (mpi%irank.EQ.0) THEN
                   !-t3e
                   WRITE (6,FMT=8100) it
                   WRITE (16,FMT=8100) it
8100               FORMAT (/,10x,'   it=    ',i5)
                   !
                   IF (.NOT.obsolete%pot8) THEN
                      !
                      !      ----> potential generator
                      !
                      !---> pk non-collinear
                      !--->        reload the density matrix from file rhomat_in
                      !--->        calculate spin-up and -down density for USE in the
                      !--->        potential generator and store the direction of
                      !--->        magnetization on file dirofmag
                      IF (noco%l_noco) THEN
                         CALL timestart("gen. spin-up and -down density")
                         CALL rhodirgen(&
                              &                     dimension,sym,stars,atoms,sphhar,&
                              &                    vacuum,26,22,cell,input,oneD)
                         CALL timestop("gen. spin-up and -down density")
                      ENDIF
                      !---> pk non-collinear

                      reap=.NOT.obsolete%disp
                      input%total = .TRUE.
                   ENDIF!(obsolete%pot8)
                ENDIF !mpi%irank.eq.0

                !--- J<
                IF(jij%l_jenerg) GOTO 234

                jij%alph1(:)=noco%alph(:)
                stop80= .FALSE.
                IF ( obsolete%eig66(1) .OR. (noco%l_soc .AND. noco%l_ss) ) THEN
                   IF ( (jij%l_J).OR.(jij%nqpt/=1).OR.(jij%nmagn/=1).OR.(jij%phnd/=1) ) THEN
                      CALL juDFT_error("fleur: J-loop with eig66 = T or ss+soc"&
                           &            ,calledby ="fleur")
                   ENDIF
                ENDIF
                DO qcount=1,jij%nqpt
                   IF (jij%l_J) THEN
                      noco%qss(:)=jij%qj(:,qcount)
                      jij%qn = ( noco%qss(1)**2 + noco%qss(2)**2 + noco%qss(3)**2 )
                   ENDIF
                   IF ( jij%l_J.AND.(mpi%irank.EQ.0) ) THEN
                      WRITE(6,*) 'qss=(',noco%qss(1),',',noco%qss(2),',',noco%qss(3),')'
                      CALL timestart("Q-point for J_ij(total)")

                   ENDIF
                   !HF
#if defined(CPP_HF) && (2==1)
                   hybrid%l_subvxc = ( xcpot%icorr == icorr_hf .OR. xcpot%icorr == icorr_pbe0 .OR.&
                        &          xcpot%icorr == icorr_hse .OR. xcpot%icorr == icorr_vhse )

                   IF ( noco%l_soc ) THEN
                      dimension%neigd2 = dimension%neigd*2
                   ELSE
                      dimension%neigd2 = dimension%neigd
                   END IF
                   IF( .NOT. ALLOCATED(results%w_iks) )&
                        &          ALLOCATE ( results%w_iks(dimension%neigd2,kpts%nkptd,dimension%jspd) )


                   IF( ( xcpot%icorr == icorr_hf  .OR. xcpot%icorr == icorr_pbe0 .OR.&
                        &           xcpot%icorr == icorr_hse .OR. xcpot%icorr == icorr_exx  .OR.&
                        &           xcpot%icorr == icorr_vhse&
                        &         ) .AND. it == 1 ) THEN
                      CALL juDFT_WARN&
                           &        ("Hybrid functionals not working in this version")
                      CALL timestart("generation of mixedbasis and coulombmatrix")

                      IF ( mpi%irank == 0 )&
                           &         WRITE(*,'(/A)',advance='no')&
                           &              ' calculation of mixedbasis...'
                      IF (it==1)&
                           &         eig_id=open_eig(&
                           &       mpi%mpi_comm,dimension%nbasfcn,dimension%neigd,kpts%nkpt(1),dimension%jspd,atoms%lmaxd,atoms%nlod,atoms%ntypd,atoms%nlotot&
                           &         ,noco%l_noco,.FALSE.,.FALSE.)
                      !               CALL open_eig(mpi_comm,
                      !     >              nbasfcn,neigd,nkpt(1),jspd,lmaxd,nlod,ntypd,nlotot,
                      !     >                 l_noco,.false.,.true.)
                      !DW TODO! eig_id has to be adjusted here
                      CALL mixedbasis(atoms,kpts,obsolete,&
                           &                  sphhar,dimension,input,&
                           &                  enpara,cell,vacuum,sym,&
                           &                  oneD,stars,xcpot,hybrid,&
                           &                  eig_id,mpi,l_restart)
                      IF ( irank == 0 ) WRITE(*,'(A)')'...done'

                      IF ( mpi%irank == 0 )&
                           &          WRITE(*,'(A)',advance='no')&
                           &               ' calculation of coulomb matrix ...'
                      CALL coulombmatrix(&
                           &            mpi,obsolete,atoms,kpts,&
                           &            cell,sym,hybrid,xcpot,l_restart,&
                           &            oneD)
                      IF ( irank == 0 ) WRITE(*,'(A)')'...done'
#ifdef CPP_MPI
                      CALL MPI_Bcast( hybrid%maxbasm1,1,MPI_INTEGER4,0,&
                           &                        mpi%mpi_comm,ierr(1) )
                      CALL MPI_Bcast( hybrid%radshmin,1,MPI_REAL8,   0,&
                           &                        mpi%mpi_comm,ierr(1) )
#endif
                      CALL timestop("generation of mixedbasis and coulombmatrix")


                      IF ( noco%l_soc ) THEN
                         input%zelec = input%zelec * 2
                      END IF

                      IF ( mpi%irank == 0 )&
                           &          WRITE(*,'(A)',advance='no') ' start fermie....'
                      CALL fermie(eig_id,&
                           &               mpi,dimension,kpts,obsolete,atoms,&
                           &               input,noco,results,jij,cell)

                      IF ( noco%l_soc ) THEN
                         input%zelec = input%zelec / 2
                      END IF

                      IF ( mpi%irank == 0 ) WRITE(*,'(A)') '...done'

                   ELSEIF ( it == 1 ) THEN ! allocate some dummy arrays
                      IF ( noco%l_soc ) THEN
                         dimension%neigd2 = dimension%neigd*2
                      ELSE
                         dimension%neigd2 = dimension%neigd
                      END IF
                      kpts%nkptf = 0; hybrid%maxindx = 0; hybrid%gptmd = 0; hybrid%maxgptm = 0
                      hybrid%maxgptm1 = 0; hybrid%maxgptm2 = 0; hybrid%maxindxm1 = 0; hybrid%maxindxm2 = 0
                      hybrid%maxlcutm1 = 0; hybrid%maxlcutm2 = 0; hybrid%maxindxp1 = 0; hybrid%maxindxp2 = 0
                      ALLOCATE(hybrid%gptm(0,0),hybrid%ngptm(0),hybrid%pgptm(0,0),hybrid%ngptm1(0),&
                           &                hybrid%pgptm1(0,0),hybrid%ngptm2(0),hybrid%pgptm2(0,0),hybrid%basm1(0,0,0,0),&
                           &                hybrid%basm2(0,0,0,0),hybrid%nindxm1(0,0),hybrid%nindxm2(0,0))
                   END IF ! first iteration hybrids
                   !HF
#endif
                   IF (.NOT.obsolete%pot8) THEN
                      CALL timestart("generation of potential")

                      CALL vgen(&
                           &             reap,input,xcpot,dimension,&
                           &             atoms,sphhar,stars,vacuum,&
                           &             sym,obsolete,cell,&
                           &             oneD,sliceplot,mpi&
                           &            ,results,noco)

                      IF (mpi%irank.EQ.0) THEN
                         CALL timestop("generation of potential")

                         !---> pk non-collinear
                         !--->          generate the four component matrix potential from spin up
                         !--->          and down potentials and direction of the magnetic field
                         IF (noco%l_noco) THEN
                            CALL timestart("generation of potential-matrix")
                            CALL vmatgen(&
                                 &                   stars,&
                                 &                   atoms,sphhar,vacuum,&
                                 &                   sym,input,oneD,8,22,26)
                            CALL timestop("generation of potential-matrix")
                         ENDIF
                         !---> end pk non-collinear
                         !---> do some output for the tddft calculations:
                         IF (input%gw /= 0) THEN
                            CALL write_xcstuff(&
                                 &                       sphhar,atoms,dimension,sym,&
                                 &                       stars,vacuum,input)
                         ENDIF
                         !
                      ENDIF ! mpi%irank.eq.0

                      !
                      !+t3e
                   ENDIF ! .not.obsolete%pot8
#ifdef CPP_MPI
                   CALL MPI_BARRIER(mpi%mpi_comm,ierr)
#endif

                   !
                   !          ----> eigenvalues and eigenfunctions
                   !
                   !--- J<
                   IF(jij%l_disp)THEN
                      jij%mtypes=1
                      jij%nmagn=1
                      jij%phnd=1
                   ENDIF
                   i_J=1
                   DO imt=1,jij%mtypes
                      DO j_J=i_J,jij%nmagn
                         DO phn=1,jij%phnd

                            IF (obsolete%eig66(1)) THEN
                               ! If eig-file exists, use it.
                               ! If eig-file does not exist, create it and stop.
                               !
                               ! eig66(2)=eig66(1)=T <=> in first run of program
                               !                         only 1st variation is done
#if (defined(CPP_HDF)||defined(CPP_IO))
#ifndef CPP_HDF
                               !TODO: LOGIC HAS to be fixed
                               !call judft_error("HDF needed for J_ij")
                               INQUIRE(file='eig.bas',exist=input%eigvar(3))
#endif
                               INQUIRE(file='eig.hdf',exist=input%eigvar(3))
#else
                               INQUIRE(file='eig.bas',exist=input%eigvar(3))
#endif
                               input%eigvar(3)=.TRUE.
                               input%eigvar(1)= .NOT.input%eigvar(3)
                               input%eigvar(2)= obsolete%eig66(2) .EQV. input%eigvar(3)
                               PRINT*, input%eigvar
                            ELSE
                               input%eigvar(1)= .TRUE.
                               input%eigvar(2)= .TRUE.
                               input%eigvar(3)= .TRUE.
                            ENDIF
                            input%eigvar(2)= input%eigvar(2) .AND. ( noco%l_soc .AND. (.NOT.noco%l_noco) )
                            ! eigvar(1/2)= 1st/2nd var. ; eigvar(3)= calc density,etc

                            IF ( noco%l_soc .AND. (.NOT.noco%l_noco) ) THEN
                               input%evonly(1)= .FALSE.
                               input%evonly(2)= input%eonly
                            ELSE
                               input%evonly(1)= input%eonly
                               input%evonly(2)= .FALSE.
                            ENDIF

                            IF ( input%eigvar(1).OR.input%eigvar(2) ) THEN
                               IF (jij%l_J) THEN
                                  input%tkb=0.
#ifdef CPP_NEVER
                                  CALL jcoff(&
                                       &              i_J,j_J,phn,mpi,atoms,atoms,&
                                       &              noco,jij)
#endif
                               ENDIF
                               IF (input%eigvar(1)) THEN
                                  CALL timestart("generation of hamiltonian and diagonalization (total)")

                                  ! WRITE(6,fmt='(A)') 'Starting 1st variation ...'
                                  CALL timestart("eigen")
                                  CALL eigen(mpi,stars,sphhar,atoms,obsolete,xcpot,&
                                       sym,kpts,dimension,vacuum,input,cell,enpara,noco,jij,oneD,hybrid,&
                                       it,eig_id, results)
                                  CALL timestop("eigen")
                                  !
                                  !                   add all contributions to total energy
                                  !
                                  IF( xcpot%icorr == icorr_pbe0 .OR. xcpot%icorr == icorr_hse .OR.&
                                       &                  xcpot%icorr == icorr_hf   .OR. xcpot%icorr == icorr_vhse&
                                       &                ) THEN
                                     DEALLOCATE( results%w_iks )
#ifdef CPP_MPI
                                     ! send all result of local total energies to the r
                                     IF (mpi%irank==0) THEN
                                        CALL MPI_Reduce(MPI_IN_PLACE,results%te_hfex%valence,&
                                             &                                1,MPI_REAL8,MPI_SUM,0,&
                                             &                                mpi,ierr(1))
                                        CALL MPI_Reduce((MPI_IN_PLACE,te_hfex%te_hfex%core,&
                                             &                                1,MPI_REAL8,MPI_SUM,0,&
                                             &                                mpi,ierr(1))
                                     ELSE
                                        CALL MPI_Reduce(results%te_hfex%valence,MPI_IN_PLACE,&
                                             &                                1,MPI_REAL8,MPI_SUM,0,&
                                             &                                mpi,ierr(1))
                                        CALL MPI_Reduce((te_hfex%te_hfex%core,MPI_IN_PLACE,&
                                             &                                1,MPI_REAL8,MPI_SUM,0,&
                                             &                                mpi,ierr(1))
                                     ENDIF
                                  END IF
#endif
                               END IF ! xcpot%icorr = any hybrid

                               ! for orbital decomposed calculations all kpts are n
                               ! so transform the eig file such that each kpt is ro
                               ! to its symmetry equivalent ones
                               IF ( banddos%dos .AND. banddos%ndir == -3 ) THEN
                                  ! generate pointer from gpts at one kpt to a diffe
#ifdef CPP_NEVER
                                  ALLOCATE( kpts%pntgptd(3) )
                                  CALL generate_pntgpt(&
                                       &                      dimension,obsolete,input,&
                                       &                      ,noco,kpts,cell,sym)
                                  ! rotate the eigenvectors to the symmetryequivalen
                                  CALL rotate_eig(&
                                       &                      kpts,dimension,atoms,&
                                       &                      sym,mpi)
#endif
                                  DEALLOCATE( kpts%pntgptd, kpts%pntgpt )
                                  ! this change is sufficient to modify fermie and c
                                  ! the enlarged kpt mesh
                                  kpts%nkpt    = kpts%nkptf
                                  kpts%nkptd   = kpts%nkptf
                               END IF

                            ENDIF
                            IF (input%eigvar(2)) THEN
                               ! RS: open unit for SOC vectors for GW
                               IF(noco%l_soc.AND.input%gw.EQ.2) THEN
                                  WRITE(6,'(A)') 'RS: open SOCVEC unit 4649'
                                  OPEN(4649,file='SOCVEC',form='unformatted')
                               ENDIF
                               ! WRITE(6,fmt='(A)') 'Starting 2nd variation ...'
                               CALL eigenso(eig_id,mpi,dimension,stars,vacuum,atoms,sphhar,&
                                    obsolete,sym,cell,noco,input,kpts, oneD)
                               IF(noco%l_soc.AND.input%gw.EQ.2) THEN
                                  CLOSE(4649)
                                  INQUIRE(1014,opened=l_endit)
                                  IF(l_endit) CLOSE(1014)
                                  INQUIRE(667,opened=l_endit)
                                  IF(l_endit) CLOSE(667)
                                  CALL juDFT_end("GW+SOC finished")
                               ENDIF
                            ENDIF
                            CALL timestop("generation of hamiltonian and diagonalization (total)")

#ifdef CPP_MPI
                            CALL MPI_BARRIER(mpi%mpi_comm,ierr)
#endif
                            IF (obsolete%eig66(1)) THEN
                               IF (mpi%irank==0) THEN
                                  WRITE (*,fmt='(A)')&
                                       &                'eig-file created, program stops'
                               ENDIF
                               !TODO LOGIC??
                               !stop80= .true.
                            ENDIF

                         ENDIF ! ( input%eigvar(1) .OR. input%eigvar(2) )

                         IF ( input%eigvar(3) .AND. noco%l_soc .AND. noco%l_ss ) THEN
#ifdef CPP_NEVER
                            CALL ssomat(eig_id, mpi,dimension,stars,vacuum,atoms,sphhar,&
                                 sym,cell,noco,input,obsolete,kpts,oneD,MPI_DOUBLE_PRECISION )
#endif
                            stop80= .TRUE.
                         ENDIF
                         !-t3e
                         !
                         !              ----> fermi level and occupancies
                         !

                         IF ( input%eigvar(3) .AND. ( .NOT.(noco%l_soc .AND. noco%l_ss) ) ) THEN
                            IF (jij%l_J) THEN

                               CALL timestart("determination of fermi energy")
                               ALLOCATE ( results%w_iks(dimension%neigd,kpts%nkptd,dimension%jspd) )
                               CALL fermie(eig_id, mpi,kpts,obsolete,input,&
                                    &        noco,minval(enpara%el0),jij,cell,results)
                               DEALLOCATE ( results%w_iks )
                               CALL timestop("determination of fermi energy")
                            ENDIF
                            IF ( noco%l_soc .AND. (.NOT. noco%l_noco) ) dimension%neigd = 2*dimension%neigd
                            IF( .NOT. ALLOCATED(results%w_iks) )&
                                 &             ALLOCATE ( results%w_iks(dimension%neigd,kpts%nkptd,dimension%jspd) )
                            IF ( (mpi%irank.EQ.0).AND.(.NOT.jij%l_J) ) THEN
                               CALL timestart("determination of fermi energy")

                               IF ( noco%l_soc .AND. (.NOT. noco%l_noco) ) THEN
                                  DO n=1,obsolete%nwd
                                     input%zelec = input%zelec*2
                                  ENDDO
                                  CALL fermie(eig_id,mpi,kpts,obsolete,&
                                       input,noco,minval(enpara%el0),jij,cell,results)
                                  results%seigscv = results%seigscv/2
                                  results%ts = results%ts/2
                                  DO n=1,obsolete%nwd
                                     input%zelec = input%zelec/2
                                  ENDDO
                               ELSE
                                  CALL fermie(eig_id,mpi,kpts,obsolete,&
                                       input,noco,minval(enpara%el0),jij,cell,results)
                               ENDIF
                               CALL timestop("determination of fermi energy")

                            ENDIF

                            IF (input%eonly) THEN
                               CALL close_eig(eig_id)

                               IF (.NOT. jij%l_J) THEN
                                  DEALLOCATE( results%w_iks )
#ifdef CPP_MPI
                                  CALL MPI_BARRIER(mpi%mpi_comm,ierr)
#endif
                                  IF (mpi%irank==0) THEN
                                     WRITE (*,fmt='(A)')&
                                          &                  'eigenvalues written, program stops'
                                  ENDIF
                                  stop80= .TRUE.
                               ENDIF
                            ENDIF ! input%eonly

                         ENDIF ! ( input%eigvar(3) .and. .not.(noco%l_soc .and. noco%l_ss) )
                         !--- J<
                         IF(jij%l_J) THEN
                            IF (.NOT. input%eonly) THEN
                               DEALLOCATE ( results%w_iks )
                            ENDIF
                            IF (((i_J.EQ.j_J)).OR.(sym%invs.AND.(jij%qn.GT.tol))) GOTO 33
                         ENDIF
                      ENDDO !phn
33                    CONTINUE
                   ENDDO !j_J
                   i_J=i_J+jij%nmagtype(imt)
                ENDDO !imt
                IF ((mpi%irank.EQ.0).AND.(jij%l_J)) THEN
                   CALL timestop("Q-point for J_ij(total)")
                ENDIF
             ENDDO !qcount
             IF (stop80) THEN
                EXIT ! it
             ENDIF

234          CONTINUE

             IF (mpi%irank.EQ.0) THEN
                IF(jij%l_J) THEN
                   IF(.NOT.jij%l_disp)THEN
                      REWIND(113)
                      REWIND(114)
#ifdef CPP_NEVER
                      CALL jcoff2(&
                           &                 atoms,sym,cell,jij,input)
#endif
                   ENDIF
                   CLOSE(113)
                   CLOSE(114)
                ENDIF
             ENDIF

             IF (.NOT.jij%l_J) THEN
                !--- J>
#ifdef CPP_MPI
                CALL MPI_BCAST(results%ef,1,MPI_DOUBLE_PRECISION,0,mpi%mpi_comm,ierr)
                CALL MPI_BCAST(results%w_iks,SIZE(results%w_iks),MPI_DOUBLE_PRECISION,0,mpi%mpi_comm,ierr)
#endif
                !-t3e
                !
                !        ----> initialise force_old
                !
                CALL force_0(results)
                !
                !        ----> charge density
                !
                !+Wannier functions
#ifdef CPP_WANN
                input%l_wann = .FALSE.
                INQUIRE (file='wann_inp',exist=input%l_wann)
                IF (input%l_wann) THEN
                   CALL wannier(mpi,atoms,noco,&
                        &         dimension,sym,obsolete,cell,kpts,&
                        &         stars,oneD,vacuum,sphhar,input,&
                        &         sliceplotresults)
                ENDIF
#endif
                !-Wannier
                CALL timestart("generation of new charge density (total)")

                CALL cdngen(eig_id,mpi,input,banddos,sliceplot,vacuum,&
                     dimension,kpts,atoms,sphhar,stars,sym,obsolete,&
                     enpara,cell,noco,jij,results,oneD)
                !
                ! the w_iks are needed for hybrid functionals so do not
                ! deallocate them in that case

                IF ( xcpot%icorr /= icorr_pbe0 .AND. xcpot%icorr /= icorr_hse .AND.&
                     &        xcpot%icorr /= icorr_hf   .AND. xcpot%icorr /= icorr_exx .AND.&
                     &        xcpot%icorr /= icorr_vhse ) THEN
                   DEALLOCATE ( results%w_iks )
                END IF

                IF ( noco%l_soc .AND. (.NOT. noco%l_noco) ) dimension%neigd=dimension%neigd/2
                !+t3e
#ifdef CPP_MPI
                CALL MPI_BCAST(enpara%evac0,SIZE(enpara%evac0),MPI_DOUBLE_PRECISION,0,mpi%mpi_comm,ierr)
                CALL MPI_BCAST(enpara%el0,SIZE(enpara%el0),MPI_DOUBLE_PRECISION,0,mpi%mpi_comm,ierr)
                &                               
                     CALL MPI_BCAST(enpara%ello0,SIZE(enpara%ello0),MPI_DOUBLE_PRECISION,0,mpi%mpi_comm,ierr)
                &                               
                     IF (noco%l_noco) THEN
                DO n= 1,atoms%ntype 
                   IF (noco%l_relax(n)) THEN
                      CALL MPI_BCAST(noco%alph(n),1,MPI_DOUBLE_PRECISION,0,mpi%mpi_comm,ierr)
                      CALL MPI_BCAST(noco%beta(n),1,MPI_DOUBLE_PRECISION,0,mpi%mpi_comm,ierr)
                   ENDIF
                ENDDO
                IF (noco%l_constr) THEN
                   CALL MPI_BCAST(noco%b_con,SIZE(noco%b_con),MPI_DOUBLE_PRECISION,0,mpi%mpi_comm,ierr)
                ENDIF
             ENDIF
#endif
             CALL timestop("generation of new charge density (total)")
             IF (mpi%irank.EQ.0) THEN
                !-t3e

                IF (banddos%ndir.GT.0) THEN
                   CALL juDFT_end("NDIR")
                END IF
                !          ----> output potential and potential difference
                IF (obsolete%disp) THEN
                   reap = .FALSE.
                   input%total = .FALSE.
                   CALL timestart("generation of potential (total)")
                   CALL vgen(reap,input,xcpot,dimension, atoms,sphhar,stars,vacuum,sym,&
                        obsolete,cell,oneD,sliceplot,mpi, results,noco)
                   CALL timestop("generation of potential (total)")

                   CALL potdis(stars,vacuum,atoms,sphhar, input,cell,sym)
                END IF
                !
                !i         ----> total energy
                !


                CALL timestart('determination of total energy')
                CALL totale(atoms,sphhar,stars,vacuum,&
                     sym,input,noco,cell,oneD,xcpot,hybrid,it,results)

                CALL timestop('determination of total energy')


                ! in case of parallel processing, the total energy calculation is done
                ! only for irank.eq.0, since no parallelization is required here. once
                ! a force calculation is applied, however, the irank.eq.0 process is
                ! led into a MPI_FINALIZE after convergence, while the other processes
                ! are not, resulting in fleur not terminating despite having finished
                ! the calculation. the next 7 lines correct that issue.
                ! (other files subject to this correction: geo.F, force_w.F)
                ! Schlipf/Klueppelberg Jun 2012
#ifdef CPP_MPI
             ELSEIF (input%l_f) THEN ! forces, but mpi%irank.ne.0
                !This does not work, you can not call MPI_BCAST within a
                !else part of irank==0 as PE=0 will not call this!
                !CALL MPI_BCAST(lconv,1,MPI_LOGICAL,0,mpi_comm,ierr)
                !IF (lconv) THEN
                !  CALL MPI_FINALIZE(ierr)
                !END IF
#endif

             ENDIF ! mpi%irank.EQ.0
             !Close file if not a hybrid calculation
             IF ( xcpot%icorr /= icorr_pbe0 .AND. xcpot%icorr /= icorr_hse .AND.&
                  &        xcpot%icorr /= icorr_hf   .AND. xcpot%icorr /= icorr_exx .AND.&
                  &        xcpot%icorr /= icorr_vhse ) CALL close_eig(eig_id)

          ENDIF !(if not jij%l_J)
       ELSE
          input%alpha = input%alpha - 10.
       END IF !(if input%alpha <10.)
       IF (.NOT.jij%l_J) THEN

          IF (mpi%irank.EQ.0) THEN
             !-t3e
             !
             !          ----> mix input and output densities
             !
             CALL timestart("mixing")
             CALL mix(stars,atoms,sphhar,vacuum,input,sym,cell,it,noco,oneD,hybrid)
             !
             CALL timestop("mixing")
             WRITE (6,FMT=8130) it
             WRITE (16,FMT=8130) it
8130         FORMAT (/,5x,'******* it=',i3,'  is completed********',/,/)
             CALL timestop("Iteration")
             !+t3e
          ENDIF ! mpi%irank.EQ.0
          ! hybrid functionals - ddist is needed on all processes
#        ifdef CPP_MPI
          CALL MPI_BCAST(hybrid%ddist,dimension%jspd,MPI_REAL8,0,mpi%mpi_comm,ierr)
#        endif

          !--- J<
       ELSE
       ENDIF !(if not jij%l_J)
       !--- J>

#ifdef CPP_MPI
       CALL MPI_BARRIER(mpi%mpi_comm,ierr)
#endif
       !-t3e
       ! Delete the broyden files after the fifth iteration
       ! in the case of a HF or hybrid functional calculation
       IF (it.EQ. 5 .AND. (xcpot%icorr.EQ.icorr_hf .OR. xcpot%icorr.EQ.icorr_pbe0&
            &.OR. xcpot%icorr.EQ.icorr_hse .OR. xcpot%icorr.EQ.icorr_vhse)&
            &     .AND. input%imix .LE. 10) THEN
          CALL system('rm -f broyd*')
       END IF
       !+fo
       INQUIRE (file='inp_new',exist=l_endit)
       IF (l_endit) THEN
          CALL juDFT_end(" GEO new inp created ! ")
       END IF
       !-fo
       IF ( hybrid%l_calhf ) ithf = ithf + 1
       IF ( xcpot%icorr == icorr_hf .OR. xcpot%icorr == icorr_pbe0 .OR.&
            &       xcpot%icorr == icorr_hse .OR. xcpot%icorr == icorr_vhse ) THEN
          l_cont = ( ithf < input%itmax )
          results%te_hfex%core    = 0
          results%te_hfex%valence = 0
       ELSE
          l_cont = ( it < input%itmax )
       END IF
80     CONTINUE

       CALL juDFT_end("all done")

     END SUBROUTINE
      END MODULE