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shijing879

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[½»Á÷] BSE+GW¼ÆËã¹âѧÎüÊÕÆ×(¼¤×Ó½áºÏÄÜ)

´ó¼ÒºÃ£¬ÇëÎÊ´ó¼ÒË­ÓÐBSE+GW¼ÆËã¹âѧÎüÊÕÆ×(¼¤×Ó½áºÏÄÜ)µÄINCARÉèÖò½Ö裬KPOINTSºÍ×¢ÒâÊÂÏҪÇóÄܼÆËã³É¹¦£¬ÎÒÒª¼ÆËãµÄÊǶþά²ÄÁÏ£¬¹ÙÍøºÍÍøÉϵÄһЩ½Ì³Ì¾Í²»ÒªÍƼöÁË£¬ÎÒÒѾ­ÊÔ¹ý£¡
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wangyikeco

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¡ï
shijing879(½ð±Ò+1): лл²ÎÓë
VASP sucks!

Goal: account for excitonic effects in the frequency dependent dielectric function
• GW0+BSE: Solve the Bethe-Salpeter-Equation on top of GW0
WORKFLOW of a GW0+BSE calculation
The workflow of the GW0+BSE calculation in job.sh consists of five consecutive steps:
Step 1: a ¡°standard" DFT groundstate calculation
Step 2: compute additional DFT ¡°virtual¡± orbitals (empty states):
• Needs the WAVECAR from Step 1.
Step 3: the GW0 calculation:
• Needs the WAVECAR and WAVEDER files from Step 2.
Step 4: (optional) use LOPTICS=.TRUE. to plot the IPA dielectric function using
the GW0-QP energies instead of DFT eigenenergies
• Needs the WAVECAR file from Step 3.
Step 5: the BSE calculation:
• Needs WAVECAR file from Step 3 and WAVEDER file from Step 2.
6Â¥2023-08-28 10:16:03
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wangyikeco

ľ³æ (ÕýʽдÊÖ)


ÒýÓûØÌû:
7Â¥: originally posted by shijing879 at 2023-08-28 15:48:51
ÕâЩÎÒ¶¼ÖªµÀ£¬ÇëÎÊÊÇ·ñÓÐÿһ²½¾ßÌåµÄincar£¬kpoints£¬ thanks in advance!...

Step 1: a ¡°standard¡± DFT groundstate calculation
KPOINTS (e.g. KPOINTS.6):
6x6x6
0
G
6 6 6
0 0 0
INCAR (copy INCAR.DFT to INCAR):
PREC = Normal
ENCUT = 250
Default
Set cutoff energy to 250 eV
ISMEAR = 0
SIGMA = 0.01
Gaussian smearing
Set small smearing width
KPAR = 2 Additional parallelization
EDIFF = 1.E-8 Set tight convergence criterium
8Â¥2023-08-29 02:56:10
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wangyikeco

ľ³æ (ÕýʽдÊÖ)


•Step 2: compute additional DFT ¡°virtual¡± orbitals (empty states)
INCAR (copy INCAR.DIAG to INCAR):
PREC = Normal ; ENCUT = 250
ALGO = Exact
NELM = 1
Exact diagonalisation of the Hamiltonian
Only 1 electronic step
ISMEAR = 0 ; SIGMA = 0.01
NBANDS = 128 Keep 128 bands after diagonalisation
LOPTICS = .TRUE.
LPEAD = .TRUE.
Compute derivative of the orbitals w.r.t. the
Bloch wave vector (stored in the WAVEDER file)
using the PEAD formalism
OMEGAMAX = 40

N.B.: This calculation needs the orbitals (WAVECAR file) written in Step 1.
9Â¥2023-08-29 02:58:01
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wangyikeco

ľ³æ (ÕýʽдÊÖ)


Step 3: RPA quasiparticles: single-shot GW (G0W0)
INCAR (copy INCAR.GW0 INCAR):

PREC = Normal ; ENCUT = 250
ALGO = GW0 ; NELM = 1 Request G0W0 calculation
ISMEAR = 0 ; SIGMA = 0.01
ENCUTGW = 150
NOMEGA = 50
OMEAGTL = 280
PRECFOCK = Normal
Eenergy cutoff for response functions
Number of points for frequency integration
NBANDS = 128 Use the same #-of-bands as in Step 2., otherwise the
WAVEDER file can not be read correctly
NBANDSGW = 12 Compute QP energies only for the first 12 bands
KPAR = 2
LWAVE = .TRUE. Write WAVECAR (contains QP-energies)

N.B.: This calculation needs the orbitals (WAVECAR file) , and the derivative of
the orbitals w.r.t. the Bloch wave vectors (WAVEDER file) written in Step 2.
10Â¥2023-08-29 03:03:57
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wangyikeco

ľ³æ (ÕýʽдÊÖ)


Step 4: (optional) plot IPA dielectric function using G0W0QP-energies
INCAR (copy INCAR.NONE INCAR):
ALGO = Nothing ; NELM = 1 Do nothing except read WAVECAR and
proceed to post-processing
NBANDS = 128
LWAVE = .FALSE. Do not write WAVECAR
LOPTICS = .TRUE. ; LPEAD = .TRUE. Compute IPA dielectric function
11Â¥2023-08-29 03:07:17
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wangyikeco

ľ³æ (ÕýʽдÊÖ)


Step 5: the BSE calculation
INCAR (copy INCAR.BSE INCAR):
PREC = Normal ; ENCUT = 250
ALGO = BSE
ANTIRES = 0
Request BSE calculation
Use the Tamm-Dancoff approximation
ISMEAR = 0 ; SIGMA = 0.01
ENCUTGW = 150 Energy cutoff for response functions
NBANDS = 128 Use the same #-of-bands as in Step 2., otherwise the WAVEDER
file can not be read correctly
NBANDSO = 4
NBANDSV = 8
Setup BSE matrix for NBANDSO HOMOs and
NBANDSV LUMOs
OMEGAMAX = 20
PRECFOCK = Normal

N.B.: This calculation needs the orbitals (WAVECAR file) of Step 3, and the derivative
of the orbitals w.r.t. the Bloch wave vectors (WAVEDER file) written in Step 2.
12Â¥2023-08-29 03:10:12
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

shijing879

гæ (³õÈëÎÄ̳)


ÒýÓûØÌû:
6Â¥: Originally posted by wangyikeco at 2023-08-28 10:16:03
VASP sucks!

Goal: account for excitonic effects in the frequency dependent dielectric function
• GW0+BSE: Solve the Bethe-Salpeter-Equation on top of GW0
WORKFLOW of a GW0+BSE calculation
...

ÕâЩÎÒ¶¼ÖªµÀ£¬ÇëÎÊÊÇ·ñÓÐÿһ²½¾ßÌåµÄINCAR£¬KPOINTS£¬ Thanks in advance!
7Â¥2023-08-28 15:48:51
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

shijing879

гæ (³õÈëÎÄ̳)


ÒýÓûØÌû:
12Â¥: Originally posted by wangyikeco at 2023-08-29 03:10:12
Step 5: the BSE calculation
INCAR (copy INCAR.BSE INCAR):
PREC = Normal ; ENCUT = 250
ALGO = BSE
ANTIRES = 0
Request BSE calculation
Use the Tamm-Dancoff approximation
ISMEAR = 0 ; SIGMA = 0.0 ...

ÕâЩÎÒÒ²ÖªµÀ£¬¶¼ÊǹÙÍøÉÏÃæµÄ£¬ÎÒÒѾ­°´ÕÕÕâ¸öËã¹ýÁË£¬Ã»³É¹¦¡£ÇëÎÊÄãÓÐû×Ô¼ºÇ×Éí¼ÆËã³É¹¦µÄһЩËãÀý¡£
13Â¥2023-08-29 15:19:18
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wangyikeco

ľ³æ (ÕýʽдÊÖ)


ÒýÓûØÌû:
13Â¥: Originally posted by shijing879 at 2023-08-29 15:19:18
ÕâЩÎÒÒ²ÖªµÀ£¬¶¼ÊǹÙÍøÉÏÃæµÄ£¬ÎÒÒѾ­°´ÕÕÕâ¸öËã¹ýÁË£¬Ã»³É¹¦¡£ÇëÎÊÄãÓÐû×Ô¼ºÇ×Éí¼ÆËã³É¹¦µÄһЩËãÀý¡£...

What  version of VASP are you doing?
14Â¥2023-08-30 09:32:08
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

shijing879

гæ (³õÈëÎÄ̳)


ÒýÓûØÌû:
14Â¥: Originally posted by wangyikeco at 2023-08-30 09:32:08
What  version of VASP are you doing?...

ÎÒÓõÄÊÇvasp6.3.2
15Â¥2023-08-31 14:55:35
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

wangyikeco

ľ³æ (ÕýʽдÊÖ)


ÒýÓûØÌû:
15Â¥: Originally posted by shijing879 at 2023-08-31 14:55:35
ÎÒÓõÄÊÇvasp6.3.2...

ÎÒµÄÀϰ汾ÉÏËÆºõûÎÊÌâ
ÄãÉý¼¶µ½×îеÄ6.4.2
»òÕß°ÑÄãµÄscript·¢¸øÎÒ, zrli3 AT hotmail dot com
16Â¥2023-09-03 02:23:57
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ÀíÏëµÄÃÀºÃ

гæ (³õÈëÎÄ̳)


¡ï
shijing879(½ð±Ò+1): лл²ÎÓë
ÄúºÃ£¬Â¥Ö÷£¬ÎÒÏëÇë½ÌÄúÈçºÎÓà GW+BSE À´¼ÆË㼤×Ó½áºÏÄÜ£¬Í¬Ê±¸øËü»­³ÉÄÜ´øÐÎʽ
BSE+GW¼ÆËã¹âѧÎüÊÕÆ×(¼¤×Ó½áºÏÄÜ)



·¢×ÔСľ³æAndroid¿Í»§¶Ë
17Â¥2024-11-19 18:37:07
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
¼òµ¥»Ø¸´
shenrenren2Â¥
2023-08-27 15:44   »Ø¸´  
shijing879(½ð±Ò+1): лл²ÎÓë
toppaper3Â¥
2023-08-27 16:11   »Ø¸´  
shijing879(½ð±Ò+1): лл²ÎÓë
·¢×ÔСľ³æAndroid¿Í»§¶Ë
tzynew4Â¥
2023-08-27 16:53   »Ø¸´  
shijing879(½ð±Ò+1): лл²ÎÓë
2023-08-27 19:53   »Ø¸´  
shijing879(½ð±Ò+1): лл²ÎÓë
XG-WUST18Â¥
2024-11-24 07:11   »Ø¸´  
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