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Once the executable exc created (it should be in \$prefix/bin after the make install) you can run the EXC code.

What you need is:

  • The ground state calculation output = kss file.
  • GW corrected energy = gw file.
  • Screening function = em1 file.
  • An input file (see below)

Then execute: exc -k file.kss -e file.em1 -g file.gw -i input > exc.log &

Defaults:
The commmand exc > exc.log & will look for a default in.kss and in.em1 files in the current directory. An input file exc.in will be also searched in the current directory.

Version 3.2 available
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The new version of EXC is available. In particular the finite momentum transfer has been implemented.

New Release: v3.1
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A new version of the code has been released: v3.1. Few changes and some bug corrections for this intermediate release.

New Release v3.0
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A new version of the code has been released: v3.0.

Theoretical Spectroscopy Lectures
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Electronic excitations are probed by experimental techniques such as optical absorption, EELS and photo-emission (direct or inverse).

Cecam School on Theoretical Spectroscopy
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Theoretical Spectroscopy Lectures: Theory and Codes