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1,我是想做稀土元素掺杂Ti2CO2,两个La原子替代两个Ti原子形成我这么一个结构,根据文献我想将两个掺杂原子设为FM和AFM构型,这个时候我该如何设置磁矩,以及这个时候我是否要加自选轨道耦合和DFT+U
这是我之前的INCAR,我尝试加了磁矩,但是计算以后OUTCAR显示磁矩为0:
Global Parameters
ISTART = 0 (Read existing wavefunction; if there)
NPAR=2
ISPIN = 2 (Spin polarised DFT)
ICHARG = 2 (Non-self-consistent: GGA/LDA band structures)
LREAL = Auto (Projection operators: automatic)
ENCUT = 410 (Cut-off energy for plane wave basis set, in eV)
PREC = Fine (Precision level)
LWAVE = .FALSE. (Write WAVECAR or not)
LCHARG = .TRUE. (Write CHGCAR or not)
ADDGRID= .TRUE. (Increase grid; helps GGA convergence)
ISYM = 0
MAGMOM = +4 +4 45*1
ISIF = 3 (Stress/relaxation: 2-Ions, 3-Shape/Ions/V, 4-Shape/Ions)
Electronic Relaxation
ISMEAR = 0 (Gaussian smearing; metals:1)
SIGMA = 0.05 (Smearing value in eV; metals:0.2)
NELM = 60 (Max electronic SCF steps)
NELMIN = 6 (Min electronic SCF steps)
EDIFF = 0.0001 (SCF energy convergence; in eV)
GGA = PE (PBE exchange-correlation)
Ionic Relaxation
NSW = 200 (Max electronic SCF steps)
IBRION = 2 (Algorithm: 0-MD; 1-Quasi-New; 2-CG)
EDIFFG = -0.02 (Ionic convergence; eV/AA)
VOSKOWN = 1
IVDW = 11
LAECHG=.TRUE.
LORBIT = 11
原子顺序方面,两个掺杂原子顺序是前两个
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