求助 VASP优化过程中离子不移动

asl1994

在对图中的吸附模型进行优化的时候，固定了最底层的原子，发现优化过程中每一步所有原子的位置都没变化，能量和力的收敛曲线也放上来了（单位分别是eV和eV/angstrom），基本都是平的，结果也没提示收敛。请问各位老师这个问题该怎么解决呢？
INCAR：


ISTART = 0
ICHARG = 2
ISPIN = 1
LREAL = .F.
NCORE = 4
LSORBIT = .F.

# Accuracy controls:
PREC = Normal
ENCUT = 500

# Electronic loop:
ALGO = Fast
EDIFF = 1E-05
NELM = 100

# DOS related values:
ISMEAR = 0
SIGMA = 0.200000   # eV

# Ironic relaxation:
IBRION = 2    # Conjugate gradient
ISIF = 2
NSW = 60
POTIM = 0.1
EDIFFG= -0.02

# DFT +U
# LDAU = .T.
# LDAUTYPE = 2
# LDAUL = 3 -1
# LDAUU = 6.35 0
# LDAUJ = 0 0

# Write flags:
LCHARG = .F.
LWAVE = .F.
LELF = .F.
LVTOT = .F.
LVHAR = .F.

# DIPOLE CORRECTION
IDIPOL = 3
LDIPOL = .T.