west-code-development / West

WEST code
https://west-code.org
GNU General Public License v3.0
14 stars 7 forks source link

[WSTAT error] encountering 'fractional occupation degenerate orbitals' when executing wstat.x #3

Open yliu1240 opened 10 months ago

yliu1240 commented 10 months ago

Hi, all! I'm running wstat.x on a structure of bulk Li metal with 1 interstitial but encountering the following error: """

 Sternheimer eq. solver... with lite-solver

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Error in routine dfpt (1): fractional occupation degenerate orbitals %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% """

Here's my setting for wstat_control: """ wstat_control: wstat_calculation: S n_pdep_eigen: 200 trev_pdep: 0.00001 """

And my setting for pw.x before performing wstat.x: """ &CONTROL calculation = 'scf' restart_mode = 'from_scratch' wf_collect = .true. outdir = './' prefix = 'i011' etot_conv_thr = 1e-06 pseudo_dir = './' / &SYSTEM ecutwfc = 60 occupations = 'smearing' degauss = 0.01 smearing = 'gaussian' nspin = 1 ntyp = 1 nat = 129 ibrav = 0 / &ELECTRONS electron_maxstep = 200 conv_thr = 1e-07 /

ATOMIC_SPECIES Li 6.94 Li_ONCV_PBE-1.2.upf

K_POINTS gamma

CELL_PARAMETERS angstrom ...... """

The Li interstitial system has 233 bands and 387 electrons as shown in pw.x calculations. I guess it's some problem in my setting for the calculation of wstat.x. Or, is it because of the gamma k-point?

Is there any more information I should provide to understand the problem?

Thanks in advance and have a nice day!

Best,