silicon carbide (001) surface;
local density functional theory;
surface reconstruction;
D O I:
10.1016/S0169-4332(00)00176-8
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
We calculate the total energies, geometries and electronic structure for two competing models of the silicon-rich (3 x 2) reconstruction of the P-SiC(001) surface. In order to compare the energies, some value of the chemical potential of silicon atoms must be assumed. For most reasonable assumptions, we find that the Yan-Semond (YS) model is favoured. This model also gives a highest occupied surface state whose dispersion characteristics match photoemission experiments. (C) 2000 Elsevier Science B.V. All rights reserved.