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thelrgbird金蟲 (小有名氣)
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[求助]
做結(jié)構(gòu)優(yōu)化和做靜態(tài)計算能量不一致
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最近計算的體系中做靜態(tài)的和做結(jié)構(gòu)優(yōu)化的能量差別比較大,不知道為什么,希望大家?guī)兔χ更c一下: 含有Ni,P,S的體系: INCAR: opt: Start parameter NWRITE = 2 PREC = Accurate ISTART = 0 ICHARG = 2 ISPIN = 2 non spin calculation Electronic Relaxation 1 (overall) ENCUT = 350 eV NELM = 60; NELMIN = 6; NELMDL = -10 EDIFF = 1E-04 LREAL = Auto VOSKOWN = 1 Electronic Relaxation 2 (details) ALGO = Fast Ionic Relaxation EDIFFG = -.1E-01 NSW = 250 IBRION = 1 NFREE = 10 ISIF = 2 IWAVPR = 11 ISYM = 2 POTIM = 0.50 DOS related values: EMIN = -10.00; EMAX = 10.00 energy-range for DOS ISMEAR = 1; SIGMA = 0.2 broadening in eV -4-tet -1-fermi Parallelisation Sets: LPLANE = .F NPAR = 6 NSIM = 4 static: Start parameter NWRITE = 2 PREC = Accurate ISTART = 0 ICHARG = 2 ISPIN = 2 non spin calculation Electronic Relaxation 1 (overall) ENCUT = 350 eV NELM = 60; NELMIN = 6; NELMDL = -10 EDIFF = 1E-04 LREAL = Auto VOSKOWN = 1 GGA = 91 Electronic Relaxation 2 (details) ALGO = Fast Ionic Relaxation NSW = 0 IBRION = -1 NFREE = 2 DOS related values: EMIN = -10.00; EMAX = 10.00 ; NEDOS = 3000 ISMEAR = -5; SIGMA = 0.2 broadening in eV -4-tet -1-fermi Parallelisation Sets: LPLANE = .F NPAR = 6 NSIM = 4 所計算出的能量: opt: -408.6489 static: -399.9020 請問這種差異正常嗎?如果不正常的話如何通過調(diào)節(jié)參數(shù)解決呢?謝謝大家了! |

金蟲 (小有名氣)
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金蟲 (小有名氣)
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