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利用半无限平方晶格的晶格格林函数的积分表达式(见: ,44(1995),987)以及由此导出的它与无限平方晶格的晶格格林函数之间的内在关系式,计算了半无限平方晶格的局部态密度和表面具有单点对角杂质时定域态的存在条件.Based on Ref. [3](Acta Physica Sinica, 44(1995), 987(in Chinese)), we have derived the relations between lattice Green's functions for the semi-infinite square lattice and the infinite square lattice. The partial density of states and the formation condition of the surface localized state are calculated by virtue of lattice Green's function for the semi-infinite square lattice.
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