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darkviolet

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[求助] 使用VASP计算石墨烯双层,文献中这短话对应的INCAR怎么写?

The project-augmented
wave method for the core-valence interaction and the Perdew–
Burke–Erzerhof (PBE) generalized gradient approximation
(GGA) for the exchange–correlation interaction is employed.
It is well known that GGA overestimates the equilibrium
distance of bilayer graphene. The van der Waals interaction
(vdW) correction is employed to obtain a reasonable bilayer
distance.A kinetic energy cutoff of 500 eV is chosen in the
plane-wave expansion. A thick (15 A ˚ ) vacuum layer is used to
avoid the interaction between two adjacent periodic images.
The reciprocal space is represented by a Monkhorst–Pack
special k-point grid. The Brillouin zone is sampled by a set
of 8* 8*1 k-points for the geometry optimizations and
21*21*1 k-points for the static total energy and density of
states calculations. Structures are relaxed using the conjugate
gradient scheme without any symmetry constraint. The
convergence of the energy and force is within 1 * 10-4 eV
and 0.01 eV A ˚^-1, respectively.
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