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雨凝幽馨

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[求助] 计算TiC的能量,算出来的能量远小于文献值

求问,计算TiC的能量,我算出来的能量远小于文献值,下面是INCAR文件。想知道我哪儿错了
# SCF input for VASP
# Note that VASP uses the FIRST occurence of a keyword
SYSTEM = (Ti C)4  (P1) ~ 88 minimized: (Pearson #531325)_1 (VASP)

    PREC = Normal
   ENCUT = 450
  IBRION = 2
     NSW = 100
    ISIF = 3
  NELMIN = 2
   EDIFF = 1.0e-05
  EDIFFG = -0.02
VOSKOWN = 1
  NBLOCK = 1
  NWRITE = 1
    NELM = 60
    ALGO = Normal (blocked Davidson)
   ISPIN = 1
  INIWAV = 1
  ISTART = 0
  ICHARG = 2
   LWAVE = .FALSE.
  LCHARG = .FALSE.
ADDGRID = .FALSE.
LHYPERFINE = .FALSE.
  ISMEAR = 1
   SIGMA = 0.2
   LREAL = .FALSE.
RWIGS = 1.45 0.77
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