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[求助]
求助vasp GW方法計(jì)算過渡金屬錯(cuò)誤CHECK_OCCUPATIONS 已有1人參與
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流程參考網(wǎng)上vasp gw計(jì)算方法帖子。 原帖地址:http://blog.sina.com.cn/s/blog_7c63531f0101ibx9.html 第一步的INCAR: Start parameter for this run: ISTART=0 ICHARG=2 # ISIF =3 NSW=0 IBRION=-1 # LWAVE=F # LCHARG=F ENCUT = 400.0 EDIFF = 1E-4 #EDIFFG=-1E-2 ISMEAR=0 LREAL=A SIGMA=0.1 #PREC=A POTIM=0.35 #NPAR=4 #NELMIN=4 NBANDS=64 第二步的INCAR: Start parameter for this run: ISTART=1 ICHARG=2 # ISIF =3 NSW=0 IBRION=-1 # LWAVE=F # LCHARG=F ENCUT = 400.0 EDIFF = 1E-4 #EDIFFG=-1E-2 ISMEAR=0 LREAL=A SIGMA=0.1 #PREC=A POTIM=0.35 #NPAR=4 #NELMIN=4 NBANDS=64 ALGO = Exact LOPTICS=.TRUE. (這兩步vasp沒有提示錯(cuò)誤) 第三步INCAR: Start parameter for this run: ISTART=1 ICHARG=1 # ISIF =3 NSW=0 IBRION=-1 # LWAVE=F # LCHARG=F ENCUT = 400.0 EDIFF = 1E-4 #EDIFFG=-1E-2 ISMEAR=0 LREAL=A SIGMA=0.1 #PREC=A POTIM=0.35 #NPAR=4 #NELMIN=4 NBANDS=64 ALGO = GW0 LOPTICS=.TRUE. LSPECTRAL = T NOMEGA = 64 NBANDSGW=64 ENCUTGW=100 PRECFOCK=F LWANNIER90=.TRUE. LRPA=.FALSE. 在以上三步vasp計(jì)算過程中保持KPOINTS等其他的文件不變。使用的計(jì)算腳本如下: #!/bin/bash mpirun -np 16 vaspwannier9012 >out wait mkdir optic cp INCAR* KPOINTS POTCAR POSCAR WAVE* CHGCAR ./optic cd optic cp INCAR-optic INCAR mpirun -np 16 vaspwannier9012 >out wait mkdir gw cp INCAR-gw KPOINTS POTCAR POSCAR WAVE* CHGCAR ./gw cd gw cp INCAR-gw INCAR mpirun -np 16 vaspwannier9012 >out 問題出在第三步: out文件錯(cuò)誤提示如下: NQ= 168 -0.0909 0.4545 0.4000, |.........|.........|.........|.........|.........|.........|.........|......... performed 923544000 updates of chi_q(r,r) total number of BLAS operations 102922.89 Gflops resolving degeneracies of screened two electron integrals calculate QP shifts <psi_nk| G(iteration)W_0 |psi_nk>: iteration 1 writing wavefunctions entering main loop optical routines imaginary and real dielectric function recalculating local potential from charge density CHECK_OCCUPATIONS: ERROR, system is not insulating. CHECK_OCCUPATIONS: ERROR, system is not insulating. CHECK_OCCUPATIONS: ERROR, system is not insulating. 根據(jù)提示,我不斷增加NBANDS空帶的條數(shù),然而始終提示這個(gè)錯(cuò)誤。 此外,如果把KPOINTS改為如下: KPOINTS 0 G 1 1 1 其他參數(shù)保持不變,結(jié)果就沒問題。但是這時(shí)候的結(jié)果應(yīng)該是沒有意義的,應(yīng)該是無法用wannier90算出能帶的。懇請(qǐng)各位使用過GW方法的能夠給個(gè)建議,謝謝大家啦! |
鐵桿木蟲 (著名寫手)
鐵桿木蟲 (著名寫手)
鐵桿木蟲 (著名寫手)
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這取決于計(jì)算的初始態(tài),如果HSE自洽結(jié)果不是金屬,就可以算,否則和LDA/GGA并無區(qū)別。GW自洽也需要初始態(tài),在這個(gè)問題上和G0W0沒有區(qū)別。 ABINIT可以算,但結(jié)果也需要謹(jǐn)慎。 |
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大神你好,我用GW 算到第三步的時(shí)候,一直卡在這是是什么意思? responsefunction array rank=6432 LDA part: xc-table for Pade appr. of Perdew allocating 2 responsefunctions rank= 6432 resonant part calculated as well allocating 2 responsefunctions rank= 6432 allocating 1 responsefunctions rank= 6432 Doing 2 frequencies on each core in blocks of 1 NQ= 1 0.0000 0.0000 0.0000, 下面一直不動(dòng)了。。。 請(qǐng)大神指導(dǎo)。 |

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