一维二链段晶体红外光谱的格林函数方法

本文用格林函数方法研究由两个链段A与B组成的一维晶体A-B的红外光谱。首先根据链段的格林函数推导晶体的T矩阵及格林函数,然后用格林函数方法研究态密度、本征频率、振幅、红外吸收强度与峰宽,最后讨论吸收峰形与谱图问题。关键词：

GREEN FUNCTION METHOD FOR CALCULATING INFRARED SPECTRUM OF ONE-DIMENSIONAL TWO-BLOCK CRYSTAL

In this article, the Green Function method has been employed to investigate the infrared spectrum of one-dimensional twobloek crystal A-E. Assuming that the Green Functions of the blocks are known, we first derive the matrices and the Green Functions of the crystal and then investigate some quantities important to infrared spectrum of the crystal, including (1) the density of states, (2) the eigenfrequencies of the crystal, (3) the normal displacements of atoms in the crystal, (4) infrared absorption intensity and (5) peak width.