论文标题
IV-VI半导体的某些第四纪固体溶液中的低温相变
Low-temperature phase transitions in some quaternary solid solutions of IV-VI semiconductors
论文作者
论文摘要
PBS $ _x $ se $ _y $ te $ _ {1-x-y} $的样本使用电气和X射线方法的4--200〜K温度范围。建立了低温相变的区域。结果表明，这些固体溶液中的相变与中心偏外的S和SN离子有关。可以考虑替代障碍对中心离子的顺序和隧道的影响，可以在定性地描述相变温度对固体溶液组成的依赖性。
Samples of PbS$_x$Se$_y$Te$_{1-x-y}$, Pb$_{1-x}$Sn$_x$Te$_{1-y}$Se$_y$, and Pb$_{1-x}$Sn$_x$Te$_{1-y}$S$_y$ quaternary solid solutions were investigated in the 4--200~K temperature range using electrical and X-ray methods. The regions where low-temperature phase transitions occur were established. It was shown that phase transitions in these solid solutions are associated with off-center S and Sn ions. The dependence of the phase transition temperature on the composition of solid solutions can be qualitatively described taking into account the influence of substitutional disorder on the ordering and tunneling of off-center ions.
