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用刚性离子模型研究了铁电半导体SnTe的晶格动力学,计及电子屏蔽作用对长程库仑作用的修正,得到了光学模反常的色散关系
The lattice dynamics of ferroelectric semiconductor SnTe has been studied with a rigid ion model. The effect of electron shielding on the long-range Coulomb interaction has been studied, and the anomalous dispersion of optical modes has been obtained