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请教大神,对异质结进行结构优化,出现这样的提示,怎样解决:
VERY BAD NEWS! internal error in subroutine IBZKPT:
Reciprocal lattice and k-lattice belong to different class of lattices. Often results are still useful... 32
POSCAR, INCAR and KPOINTS ok, starting setup
FFT: planning ...
WAVECAR not read
WARNING: random wavefunctions but no delay for mixing, default for NELMDL
entering main loop
N E dE d eps ncg rms rms(c)
INCAR 如下所示 :
Global Parameters
ISTART = 1 (Read existing wavefunction; if there)
ISPIN = 1 (Non-Spin polarised DFT)
# ICHARG = 11 (Non-self-consistent: GGA/LDA band structures)
LREAL = .FALSE. (Projection operators: automatic)
ENCUT = 450 (Cut-off energy for plane wave basis set, in eV)
PREC = Normal (Precision level)
LWAVE = .TRUE. (Write WAVECAR or not)
LCHARG = .FALSE. (Write CHGCAR or not)
ADDGRID=.FALSE. (Increase grid; helps GGA convergence)
# LVTOT = .TRUE. (Write total electrostatic potential into LOCPOT or not)
# LVHAR = .TRUE. (Write ionic + Hartree electrostatic potential into LOCPOT or not)
# NELECT = (No. of electrons: charged cells; be careful)
# LPLANE = .TRUE. (Real space distribution; supercells)
# NPAR = 4 (Max is no. nodes; don't set for hybrids)
# Nwrite = 2 (Medium-level output)
# KPAR = 2 (Divides k-grid into separate groups)
# NGX = 500 (FFT grid mesh density for nice charge/potential plots)
# NGY = 500 (FFT grid mesh density for nice charge/potential plots)
# NGZ = 500 (FFT grid mesh density for nice charge/potential plots)
Electronic Relaxation
ISMEAR = 1 (Gaussian smearing; metals:1)
SIGMA = 0.05 (Smearing value in eV; metals:0.2)
NELM = 90 (Max electronic SCF steps)
NELMIN = 6 (Min electronic SCF steps)
EDIFF = 1E-05 (SCF energy convergence; in eV)
# GGA = PS (PBEsol exchange-correlation)
Ionic Relaxation
NSW = 100 (Max ionic steps)
IBRION = 2 (Algorithm: 0-MD; 1-Quasi-New; 2-CG)
ISIF = 2 (Stress/relaxation: 2-Ions, 3-Shape/Ions/V, 4-Shape/Ions)
EDIFFG = -2E-02 (Ionic convergence; eV/AA)
# ISYM = 2 (Symmetry: 0=none; 2=GGA; 3=hybrids)
KPOINTS 如下:
K-Spacing Value to Generate K-Mesh: 0.030
0
Gamma
6 14 1
0.0 0.0 0.0
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