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greatqi木蟲 (正式寫手)
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[求助]
求助band計(jì)算。 已有1人參與
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計(jì)算Bi的能帶出現(xiàn)以下問題: maximum and minimum number of plane-waves per node : 314 294 maximum number of plane-waves: 314 maximal index in each direction: IXMAX= 6 IYMAX= 4 IZMAX= 4 IXMIN= -4 IYMIN= -6 IZMIN= -6 WARNING: aliasing errors must be expected set NGX to 22 to avoid them WARNING: aliasing errors must be expected set NGY to 22 to avoid them WARNING: aliasing errors must be expected set NGZ to 22 to avoid them aliasing errors are usually negligible using standard VASP settings and one can safely disregard these warnings serial 3D FFT for wavefunctions parallel 3D FFT for charge: minimum data exchange during FFTs selected (reduces bandwidth) total amount of memory used by VASP on root node 43466. kBytes ======================================================================== base : 30000. kBytes nonl-proj : 2295. kBytes fftplans : 800. kBytes grid : 1216. kBytes one-center: 16. kBytes wavefun : 9139. kBytes initial charge density was supplied: 到這里就不計(jì)算了。我是在這之前提供了WAVECAR、CHGCAR,我搜索了其它一些相關(guān)帖子。還有就是改變NGX、NGY、NGZ,但是都無法改變。內(nèi)存不夠(但我的原子也比較少)。還請各位多多指導(dǎo)。 SYSTEM = Bi ICHARG= 11 # charge read file ISTART=1 ENCUT = 150 ISMEAR = 1 SIGMA = 0.2 LORBIT = 11 NGX=22 NGY=22 NGZ=22 LAECHG=.TRUE. |
木蟲 (著名寫手)
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很明顯,格點(diǎn)數(shù)不夠。你應(yīng)該設(shè)置PREC = Accurate 或 PREC = High 另外,計(jì)算能帶的話,k點(diǎn)數(shù)需要比做靜態(tài)自洽計(jì)算時(shí)要多得多,具體說明見:http://cms.mpi.univie.ac.at/vasp ... e_calculations.html |

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