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夏茉爽爽

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[求助] 请问下面这段话中使用的是什么计算方法?

文章写作引用时,该怎么描述这段话使用的方法?All the calculations presented in this paper were performed using theVienna ab initio simulation package (VASP) code.The instantaneouselectronic ground state was calculated by solving the Kohn–Sham equa-tion based on DFT. The periodic boundary condition was used to takecare of the periodicity of the solid. The present method used the plane-wave basis set in conjunction with the ultra-soft Vanderbilt pseudopoten-tials.The advantage of using this computationally efficient scheme isthat it permits the use of fast Fourier transform techniques. The exchangecorrelation functional was expressed within the generalized gradient ap-proximation (GGA) with the Perdew–Wang 91 functional.The Bril-louin zone sampling was restricted to the gamma point.

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