The lattice dynamics of the ferroelectric semiconductor SnTe was investigated by using the rigid-ion model. Considering the screening effect of electrons on long-range Coulomb force, the abnormal dispersion relation was obtained.
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刘平 徐文兰.铁电半导体SnTe的晶格动力学[J].红外与毫米波学报,2000,19(1):75~77]. LIU Ping, XU Wen-Lan, LU Wei. THE LATTICE DYNAMICS OF THE FERROELECTRIC SEMICONDUCTOR SnTe[J]. J. Infrared Millim. Waves,2000,19(1):75~77.]
