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北風(fēng)吹啊鐵蟲 (小有名氣)
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[求助]
vasp 離子步只跑了3步,dE還很大,就說收斂了,是怎么回事??
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我的結(jié)構(gòu)是表面上有個(gè)cluster,120個(gè)原子。我在前面已經(jīng)優(yōu)化過了結(jié)構(gòu),收斂了,結(jié)構(gòu)比較合理。 這次計(jì)算只是去掉了一個(gè)氧原子,想算一下空位形成能。 vasp 離子步只跑了3步,d E =-.576572E+02 還很大,就說收斂了,是怎么回事?? EDIFF、NELM、EDIFFG都是默認(rèn)值,POTIM=0.1. 我看電子步跑了60步到最大值了,要不要把NELM加大呢? 下面簡(jiǎn)單列了OSZICAR的結(jié)果: entering main loop N E dE d eps ncg rms rms(c) RMM: 1 0.856523697897E+04 0.85652E+04 -0.23656E+05 1032 0.985E+02 RMM: 2 0.303777438339E+04 -0.55275E+04 -0.63732E+04 1032 0.282E+02 RMM: 3 0.120743650014E+04 -0.18303E+04 -0.20187E+04 1032 0.199E+02 RMM: 4 0.232904630700E+03 -0.97453E+03 -0.80517E+03 1032 0.189E+02 RMM: 5 -0.301928474056E+03 -0.53483E+03 -0.39350E+03 1032 0.116E+02 ........... RMM: 58 -0.613962913659E+03 -0.87356E+01 -0.51924E+00 2073 0.441E+00 0.439E+01 RMM: 59 -0.615169002585E+03 -0.12061E+01 -0.87625E-01 2080 0.201E+00 0.433E+01 RMM: 60 -0.615934407958E+03 -0.76541E+00 -0.26866E-01 2103 0.119E+00 1 F= -.61593441E+03 E0= -.61595251E+03 d E =-.615934E+03 mag= 96.9828 curvature: 0.00 expect dE= 0.000E+00 dE for cont linesearch 0.000E+00 trial: gam= 0.00000 g(F)= 0.382E+00 g(S)= 0.000E+00 ort = 0.000E+00 (trialstep = 0.100E+01) search vector abs. value= 0.382E+00 bond charge predicted N E dE d eps ncg rms rms(c) RMM: 1 -0.616414208634E+03 -0.12452E+01 -0.20533E+01 2115 0.606E+00 0.436E+01 RMM: 2 -0.855334771199E+03 -0.23892E+03 -0.18604E+02 2106 0.223E+01 0.137E+02 RMM: 3 -0.632885173476E+03 0.22245E+03 -0.10007E+02 2064 0.215E+01 0.770E+01 RMM: 4 -0.613976729445E+03 0.18908E+02 -0.34720E+01 2069 0.120E+01 0.354E+01 RMM: 5 -0.619880022167E+03 -0.59033E+01 -0.11977E+01 2074 0.761E+00 0.289E+01 ....... RMM: 57 -0.673116148001E+03 -0.16096E-02 -0.27028E-04 1340 0.304E-02 0.145E+00 RMM: 58 -0.673114612545E+03 0.15355E-02 -0.94439E-05 1220 0.179E-02 0.148E+00 RMM: 59 -0.673112177097E+03 0.24354E-02 -0.69843E-05 1211 0.168E-02 0.150E+00 RMM: 60 -0.673112422360E+03 -0.24526E-03 -0.66699E-05 1173 0.139E-02 2 F= -.67311242E+03 E0= -.67309912E+03 d E =-.571780E+02 mag= 82.5543 trial-energy change: -57.178014 1 .order -0.248124 -0.381829 -0.114420 step: 1.0003(harm= 1.4279) dis= 0.01946 next Energy= -673.112442 (dE=-0.572E+02) bond charge predicted N E dE d eps ncg rms rms(c) RMM: 1 -0.673111494709E+03 0.68239E-03 -0.28328E-05 1092 0.102E-02 0.151E+00 RMM: 2 -0.673243049842E+03 -0.13156E+00 -0.60539E-02 2120 0.487E-01 0.216E+00 RMM: 3 -0.673276965381E+03 -0.33916E-01 -0.37351E-02 2074 0.372E-01 0.240E+00 RMM: 4 -0.673283230064E+03 -0.62647E-02 -0.19439E-02 2070 0.291E-01 0.147E+00 RMM: 5 -0.673283122864E+03 0.10720E-03 -0.50074E-03 2043 0.132E-01 0.169E+00 ......... RMM: 56 -0.673574115277E+03 0.15949E-02 -0.14751E-03 1828 0.683E-02 0.145E+00 RMM: 57 -0.673567578727E+03 0.65366E-02 -0.59063E-04 1601 0.499E-02 0.147E+00 RMM: 58 -0.673565550345E+03 0.20284E-02 -0.23339E-04 1335 0.314E-02 0.147E+00 RMM: 59 -0.673564938652E+03 0.61169E-03 -0.18123E-04 1280 0.248E-02 0.145E+00 RMM: 60 -0.673591572160E+03 -0.26634E-01 -0.33278E-03 1974 0.118E-01 3 F= -.67359157E+03 E0= -.67356894E+03 d E =-.576572E+02 mag= 84.2310 curvature: -0.00 expect dE=-0.209E-03 dE for cont linesearch -0.389E-04 trial: gam= 0.18927 g(F)= 0.188E+00 g(S)= 0.000E+00 ort = 0.115E+00 (trialstep = 0.100E+01) search vector abs. value= 0.245E+00 reached required accuracy - stopping structural energy minimisation |
鐵蟲 (小有名氣)
木蟲 (職業(yè)作家)
鐵蟲 (小有名氣)
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IALGO = 48 ENCUT = 400.00 SYSTEM = MgCuFe2O4-Au PREC = accurate ISPIN = 2 NPAR = 2 ISTART=0 ICHARG=2 #DFT+U for Mg Cu Fe O Au LDAU=T LDAUL=-1 -1 2 -1 -1 LDAUU= 0 0 4 0 0 LDAUJ= 0 0 0 0 0 Ionic Relaxation NSW = 250 number of steps for IOM ISIF = 2 IBRION = 2 conjugate-gradient algorithm POTIM = 0.1 #EDIFFG = -0.05 DOS related values: ISMEAR = 1 SIGMA = 0.2 SGI Origin optimized values: LWAVE = .FALSE. LCHARG = .FALSE. LVTOT = .FALSE. LREAL=.FALSE. |
木蟲 (職業(yè)作家)
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