三元黄铁矿型化合物 IrBi$_{1-x}$Te$_{1+x}$ ($x \approx 0.2$) 在环境和高压下的超导性

Qing-Ge Mu, Walter Schnelle, Guo-Wei Li, Horst Bormann, Claudia Felser, Sergey Medvedev
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引用次数: 0

摘要

我们报告了临界温度为 1.7 K 的三元化合物 IrBi$_{0.8}$Te$_{1.2}$的超导性。T_c$随压力呈圆顶形变化,在 26.5 GPa 时的最大值为 2.6 K。通过与压力相关的电阻率、霍尔效应和拉曼光谱测量,研究了压力对 IrBi$_{0.8}$Te$_{1.2}$ 的电子特性和晶格动态的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Superconductivity in ternary pyrite-type compound IrBi$_{1-x}$Te$_{1+x}$ ($x \approx 0.2$) at ambient and high pressure
We report superconductivity in the ternary compound IrBi$_{0.8}$Te$_{1.2}$ with critical temperature 1.7 K. The replacement of Bi by Te leads to the metallic conductivity in contrast to the semiconducting parent compound IrBiTe. The superconductivity can be further enhanced by application of external pressure. $T_c$ demonstrates dome-shaped dependence on pressure with a maximum value of 2.6 K at 26.5 GPa. Pressure effects on electronic properties and lattice dynamic of IrBi$_{0.8}$Te$_{1.2}$ were studied by pressure dependent electrical resistivity, Hall effect and Raman spectroscopy measurements.
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