4.5 Article

Pressure-induced structural transitions between successional superconducting phases in GeTe

期刊

JOURNAL OF PHYSICS-CONDENSED MATTER
卷 33, 期 35, 页码 -

出版社

IOP PUBLISHING LTD
DOI: 10.1088/1361-648X/ac0c3a

关键词

high-pressure; structural transitions; superconducting phases

资金

  1. Major Program of the National Natural Science Foundation of China [52090024]
  2. National Key R&D Program of China [2018YFA0305900]
  3. National Natural Science Foundation of China [11874175, 12074139, 11974130, 11874176, 12034009, 11974134]
  4. Jilin Province Outstanding Young Talents Project [20190103040JH]
  5. Jilin Provincial Science Foundation [20180101219JC]
  6. Strategic Priority Research Program of Chinese Academy of Sciences [XDB33000000]
  7. Program for JLU Science and Technology Innovative Research Team (JLUSTIRT)

向作者/读者索取更多资源

This study systematically investigated the pressure dependence of electrical transport and the structural evolution of GeTe, revealing different structural phase transitions and superconductivity transitions at different pressures. The results provide experimental support for understanding the fundamental properties of phase-change materials.
Being a best-known prototype of phase-change materials, GeTe was reported to possess many high-pressure phases, whose structural evolution and superconductivity remain under debate for decades. Herein, we systematically investigated the pressure dependence of electrical transport and the structural evolution of the GeTe via in situ angle-dispersive synchrotron x-ray diffraction and resistance measurements up to 55 GPa. At room temperature, the structural phase transitions from the initial rhombohedral phase to the Fm (3) over barm phase, and then to an orthorhombic Pnma phase, were observed at pressures of about 4 and 13.4 GPa, respectively. Furthermore, the metallization occurred at around 11 GPa, where the superconductivity could also be observed. With increasing pressure, the superconducting transition temperature increases monotonically from 5.7 to 6.4 K and then is independent of pressure above 23 GPa in the pure Pnma phase. These results provide insights into the pressure-dependent evolution of the structure and superconductivity in GeTe and have implications for the understanding of other IV-VI semiconductors at high pressure.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据