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.. spex documentation master file, created by
   sphinx-quickstart on Sat Dec 15 17:35:56 2018.
   You can adapt this file completely to your liking, but it should at least
   contain the root `toctree` directive.

Welcome to spex's documentation!
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Spex is a computer code based on many-body perturbation theory. It uses the all-electron full-potential linearized augmented plane-wave method (FLAPW), which provides an accurate basis set for all kinds of materials including transition metals, oxides and even f-electron systems.
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Currently Spex can calculate quasiparticle properties (one-shot and self-consistent) using the GW approximation, EELS and optical spectra as well as total energies in the RPA approximation, and spin-wave spectra from the Bethe-Salpeter equation. (TDDFT is implemented but unmaintained at the moment.)

It needs input from a converged DFT calculation, which can be generated by Fleur but also by any other FLAPW-DFT code.

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If you use SPEX for your research, please cite the following work:

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.. highlights:: Christoph Friedrich, Stefan Blügel, Arno Schindlmayr, "Efficient implementation of the GW approximation within the all-electron FLAPW method", *Phys. Rev. B 81, 125102 (2010)*.
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.. toctree::
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   :maxdepth: 2
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   installation
   getting_started
   general_information
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   common_keywords
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   tutorials
   basis_sets
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   spex_faq
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