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rhinezju金蟲(chóng) (初入文壇)
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[求助]
Ag單原子能量計(jì)算
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以前算單個(gè)O, H等原子能量都沒(méi)問(wèn)題, 今天算了一個(gè)Ag原子能量, 居然是正的好幾十eV 參數(shù)如下: INCAR: NWRITE = 1; LPETIM=F write-flag & time ISTART = 0 job : 0-new 1-cont 2-samecu LWAVE = .F. LCHARG = F ISPIN=2 NELM = 2000 NELMIN = 5 EDIFFG = -0.010 PREC = A NSW = 0 for static cal/. NBLOCK = 1 ; KBLOCK = 5 inner block; outer block IBRION = -1 ionic relax: 0-MD 1-quasi-New 2-CG POTIM = 0.3 LCORR = T Harris-correction to forces ENCUT = 400 ISMEAR = 0 SIGMA = 0.05 LREAL = A KPOINTS: K-points 0 G 1 1 1 0 0 0 POSCAR: Ag atom 1.00000000000000 20.0 0.0 0.0 0.0 19.0 0.0 0.0 0.0 19.5 1 Direct 0.5 0.5 0.5 用的是PAWPBE的勢(shì) 但是我把ENCUT提高到800eV以上就變成負(fù)的了 算單個(gè)原子需要單獨(dú)把ENCUT提高嗎? |
金蟲(chóng) (正式寫(xiě)手)
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