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liuliuhot

铜虫 (初入文坛)

[求助] GdMn2O5自洽计算难以收敛

如题最近用vasp计算GdMn2O5体系,但是考虑4f电子和Gd以及Mn的磁矩,体系总能量总是难以收敛,
下面附上我的INCAR,POSCAR和KPOINTS,求大神指点:
选用的赝势是:
POTCAR TITEL:
   TITEL  = PAW_PBE Gd 08Apr2002
   TITEL  = PAW_PBE Mn 06Sep2000
   TITEL  = PAW_PBE O 08Apr2002

附录
INCAR:
Startparameter for this run:
   PREC   = accurate    normal or accurate (medium, high low for compatibility)
   ISTART =      0    job   : 0-new  1-cont  2-samecut
   ICHARG =      2    charge: 1-file 2-atom 10-const

Electronic Relaxation 1
   ENCUT  =  400.0 eV  29.40 Ry    5.42 a.u.   8.10  8.10 21.46*2*pi/ulx,y,z
   NELM   =     120;   NELMIN=  2; NELMDL= -5     # of ELM steps
   EDIFF  =   1E-06   stopping-criterion for ELM
   LREAL  =   Auto    real-space projection
   LMAXMIX     =    6 max onsite mixed and CHGCAR
Ionic relaxation
   EDIFFG =  -4E-02   stopping-criterion for IOM
   NSW    =      0    number of steps for IOM
   IBRION =      2    ionic relax: 0-MD 1-quasi-New 2-CG
   ISIF   =      2    stress and relaxation
   ISYM   =     -1    0-nonsym 1-usesym 2-fastsym

DOS related values:
   ISMEAR =     0  # SIGMA  =   0.10  broadening in eV -4-tet -1-fermi 0-gaus

Electronic relaxation 2 (details)
   IALGO  =     48    algorithm
   LDIAG  =      T    sub-space diagonalisation (order eigenvalues)
   
   LWAVE = F
   LCHARG = T

#GGA = PS

NPAR = 6  
LPLANE = T

ISPIN = 2
LORBIT = 11

LDAU = T
LDAUTYPE = 1
LDAUL = 3 2 -1  
LDAUU = 6.7 4  0  
LDAUJ = 0.7  0.88  0  

GGA_COMPAT  = F


#mixing parameters,used when in slow convergence
AMIX =0.2
BMIX =0.0001
AMIX_MAG =0.8
BMIX_MAG =0.0001

#LSORBIT = T
LNONCOLLINEAR =  T
RWIGS  =   1.482   1.323   .820  

MAGMOM = 5.14 -5.14 4.75 -4.75 5.14 -5.14 -4.75 4.75 -3.0 3.0 -3.0 3.0 -3.0 3.0 -3.0 3.0 4.0 -4.0 -4.0 4.0 -4.0 4.0 4.0 -4.0 40*0.0

KPOINTS:
Automatic mesh
0
Monkhorst
1 2 4
0 0 0
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liuliuhot

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这个问题我已经自己解决了
2楼2015-05-04 10:00:56
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