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ÎÄÕÂд×÷ÒýÓÃʱ£¬¸ÃÔõôÃèÊöÕâ¶Î»°Ê¹Óõķ½·¨£¿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¨CSham 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¨CWang 91 functional.The Bril-louin zone sampling was restricted to the gamma point. ·¢×ÔСľ³æIOS¿Í»§¶Ë |
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