Dear Sir,
I find the large gap between my calculation and refenrence (Efficient calculation of carrier scattering rates from first principles, Supplementary Table 4, PbTe).
my POSCAR :
PbTe
1.00000000000000
0.0000000000000000 3.2255882706282835 3.2255882706282835
3.2255882706282835 0.0000000000000000 3.2255882706282835
3.2255882706282835 3.2255882706282835 -0.0000000000000000
Pb Te
1 1
Direct
0.0000000000000000 0.0000000000000000 0.0000000000000000
0.5000000000000000 0.5000000000000000 0.5000000000000000
0.00000000E+00 0.00000000E+00 0.00000000E+00
0.00000000E+00 0.00000000E+00 0.00000000E+00
my INCAR:
SYSTEM=PbTe
ENCUT=600
ISTART=0
ICHARG=2
NELM=6000
ISMEAR=-5
ADDGRID = True
EDIFF = 1E-8
PREC = Accurate
NSW = 1
IBRION = 8
LEPSILON = True
my KPOINTS:
A
0
G
23 23 23
0.0 0.0 0.0
my results:
high-frequency dielectric constant:
MACROSCOPIC STATIC DIELECTRIC TENSOR (including local field effects in DFT)
28.747731 0.000000 -0.000000
-0.000000 28.747731 -0.000000
0.000000 0.000000 28.747731
MACROSCOPIC STATIC DIELECTRIC TENSOR IONIC CONTRIBUTION
120.403178 0.000000 0.000000
0.000000 120.403177 -0.000000
0.000000 -0.000000 120.403181
static_dielectric:
- [149.2, 0, 0]
- [0, 149.2, 0]
- [0, 0, 149.2]
pop_frequency:
(base) [guodonglin@localhost Dielectric]$ amset phonon-frequency
Frequency Weight
-0.00 0.00
-0.00 0.00
-0.00 0.00
1.12 0.33
1.12 0.33
1.12 0.33
pop_frequency: 1.12 THz
(base) [guodonglin@localhost Dielectric]$
theSupplementary Table 4, PeTe (Efficient calculation of carrier scattering rates from first principles)
how to solve this problem?
Thanks.