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大家好:
之前算过体相结构的COHP,挺顺利的,这次算的是一个表面结构,看表面上两个原子之间的成键,然后不论怎么调整,系统一直提示错误,先是说KPOINTS文件里面读不到倒易点阵关键参数,就去之前scf计算的vasprun.xml文件里面读,读完又提示:我用的是完全对称的K点:You are using a fully symmetrized k-point grid.要求要重新设置K点,达到“无对称”性的K点结构,原文:Please Prepare a k-point grid that spans EITHER the whole Brillouin zone (i.e. without symmetry) or half of the Brillouin zone WARNING: (i.e. only time reversal symmetry),这里面的“时间反对称”是什么意思?我查了好多地方,不知道怎么处理这个地方的。
按照lobster的手册,要求准备KPOINTS文件,不能是自动生成的:The path through the Brillouin zone needed to display a fatband plot must be prepared manually.In VASP, the k-points forming the path are put together with other k-points within the KPOINTS
file. Hence, instead of using the automatic k-mesh generation, all k-points (for an SCF calculation and for the fatband purpose) are entered explicitly (see VASP manual how to do this). To
avoid double counting, add the k-points for the fatband purpose with a zero weight at the end of the KPOINTS file.
那我就用之前scf计算用的K点:
Auto
0
G
9 6 1
0. 0. 0.
还是不行
修改INCAR,关闭对称性,提高NBANDS数量至1800:
PREC = A
ENCUT = 400 eV
NELMIN= 5
LREAL = A
# ALGO = Fast
EDIFF = 1E-5
# ISMEAR = 0
# SIGMA = 0.02
NPAR = 8 ## Important to reduce calculate time, equal sqrt(cpu cores)
# LDAU=.TRUE. ## For LDA + U set
# LDAUTYPE=2
# LDAUL=2 -1
# LDAUU=3 0
# LDAUJ=0 0
ISPIN = 2 ## For magnetism set
# MAGMOM = 3*1
Self-consistent
NELM = 100
ICHARG = 2
NSW = 0
IBRION = -1
ISYM = -1
NBANDS = 1800
ISMEAR = -5
LCHARG = F
LWAVE = T
IVDW = 12
还是一样提示出错,错误信息都不变的,奇怪的很
我的lobsterin文件
COHPstartEnergy -20
COHPendEnergy 10
usebasisset pbeVaspFit2015
basisfunctions Ni 4s 3d 4p
basisfunctions Mo 5s 4d 5p
basisfunctions N 2s 2p
cohpbetween atom 114 atom 124 orbitalwise
autoRotate
cohpGenerator from 1.9 to 2.1 type Mo type N
实在没招了,上来请教大家帮忙,我到底哪里错了?该怎么修改?
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