Discovery of Superconductivity in Mercury Cadmium Telluride,The Journal of Physical Chemistry C

当前位置： X-MOL 学术 › J. Phys. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Discovery of Superconductivity in Mercury Cadmium Telluride
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2021-11-01 , DOI: 10.1021/acs.jpcc.1c08169
Ya-Kang Peng _{1,

2,

3,

4} , Feng-Xian Bai ₄ , Ge Huang ₄ , Hao Yu _{4,

5} , Zuo-Yuan Dong ₄ , Quan-Zhi Sun ₁ , Ning Dai ₁ , Yan Sun ₁ , Xiao-Jia Chen _{4,

5}

Affiliation

Mercury cadmium telluride compounds exhibit large tunability of nontrivial electronic states by modifying chemical composition, temperature, or pressure. Despite the growing interest in Hg_1–xCd_xTe, very little information currently exists on how their electrical properties are affected upon compression. Here, we systematically investigate the high-pressure behaviors of bulk Au-doped Hg_0.781Cd_0.219Te crystals with the doping level close to the Kane fermion point. A clear structure evolution path of this compound with pressure varying from zinc blende (F43̅m) through cinnabar (P3₁21) and rocksalt (Fm3̅m) to the orthorhombic one (Cmcm) is established from the measurements of phonon spectra, resistivity, and the Hall effect. Pressure-induced phonon softening is proposed to be the driving force for the phase transition. The last two phases are found to exhibit superconductivity with different pressure dependence of the critical temperature. These results and findings suggest that superconductivity is the general nature of mercury cadmium tellurium compounds at high pressures. The group II–VI compounds thus also offer a pool for finding new superconductors.

中文翻译：

发现碲镉汞超导性

通过改变化学成分、温度或压力，碲化汞镉化合物表现出非平凡电子态的大可调性。尽管人们对 Hg _{1– x} Cd _x Te 的兴趣越来越大，但目前关于它们的电性能如何受到压缩影响的信息很少。在这里，我们系统地研究了掺杂水平接近凯恩费米子点的块状 Au 掺杂 Hg _0.781 Cd _0.219 Te 晶体的高压行为。从闪锌矿 ( F 43̅ m ) 到朱砂 ( P 3 ₁ 21 ) 和岩盐 ( Fm )压力变化的该化合物的清晰结构演化路径3̅ m ) 到正交 ( Cmcm ) 是根据声子光谱、电阻率和霍尔效应的测量建立的。压力诱导的声子软化被认为是相变的驱动力。发现最后两相表现出具有不同临界温度压力依赖性的超导性。这些结果和发现表明超导性是高压下汞镉碲化合物的一般性质。因此，II-VI 族化合物也为寻找新的超导体提供了一个平台。

更新日期：2021-11-11

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南