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请问QE是否能够计算600多个原子的结构呢?我使用400个核,发现1小时1个电子步都没有动。
VASP可以很轻松计算这个case。
QE输入文件如下:
&CONTROL
calculation = 'relax'
nstep = 1000 ! ion relax step
title = 'pwscf'
restart_mode = 'from_scratch'
outdir = './'
prefix = 'pwscf'
wf_collect = .false.
pseudo_dir = './'
pseudo_dir = 'pseudo/ONCV',
etot_conv_thr = 1.0D-6
forc_conv_thr = 1.0D-6
tstress = .true.
tprnfor = .true.
/
&SYSTEM
ibrav = 0
nat= 656
ntyp= 6
ecutwfc = 50
ecutrho = 400
occupations = 'smearing'
degauss = 0.001
smearing = 'gaussian'
nosym =.TRUE. !no symmetry
input_dft='PBE'
vdw_corr='DFT-D3'
/
&ELECTRONS
electron_maxstep = 250
conv_thr = 1.0D-10
diagonalization = 'david' ! 'cg'
mixing_mode = 'plain', ! default: 'plain'
/
&IONS
ion_dynamics = 'bfgs'
!pot_extrapolation = 'second_order'
!wfc_extrapolation = 'second_order'
/
&CELL
cell_dynamics = 'bfgs'
!press_conv_thr = 0.1
/
ATOMIC_SPECIES
C 12.01 C_ONCV_PBE-1.2.upf
N 14.01 N_ONCV_PBE-1.2.upf
H 1.008 H_ONCV_PBE-1.2.upf
Pb 207.2 Pb_ONCV_PBE-1.2.upf
I 126.9 I_ONCV_PBE-1.2.upf
Cs 132.9 Cs_ONCV_PBE-1.2.upf
K_POINTS crystal
1
0 0 0 1 #band edge at gamma point
CELL_PARAMETERS (angstrom)
24.7917575836 0 0
0 24.7502574874 0
0 0 25.1272659217
ATOMIC_POSITIONS (crystal)
C 0.1250191180 0.1250365080 0.3901285530
C 0.1250191180 0.1250365080 0.8901285530
...
请大家帮忙指出问题/意见,谢谢!
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