# Input file

## Error message

Deprecated function: The each() function is deprecated. This message will be suppressed on further calls in node_privacy_byrole_nodeapi_prepare() (line 216 of /var/www/exc/sites/all/modules/node_privacy_byrole/node_privacy_byrole.module).

This is an example of input file to be given to EXC. For a complete list of input variables see below.

 exciton ! important

exc ! full excitonic calculation. this will imply the use of an abinit SCR file

so ! use a scissor operator which implies a value for soenergy,
! alternatively you might use 'gw' which implies the use of an abinit GW file
soenergy 0.6

shiftk ! put this value if you use shifted k-points

matsh 4 ! this is just an update of the old (still working) npwmat
(but instead of giving the total number of plane waves, you give a closed shell)
npwsh 12 ! this is just an update of the old (still working) npwwfn
(but instead of giving the total number of plane waves, you give a closed shell)

nband 8 ! last band to be considered in the calculation
lomo 1 ! first band to be considered: 1 is default

haydock ! use haydock iterative technique: this avoid the full diagonization
niter 100 ! number of iterations in the haydock iterative scheme

omegai 0.0 ! first frequency (eV)
omegae 10.0 ! last frequency (eV)
domega 0.1 ! step of frequency (eV)