Pressure-Induced Alloying and Superconductivity in GeTe

Cheng, Hu1; Yao, Huanli4; Xu, Yixuan1,5; Jiang, Jiayue1,5; Yang, Yiming1; Wang, Jiayi1; Li, Xiaodong1; Li, Yanchun1; Shao, Jifeng2,3

2024-04-10

10.1021/acs.chemmater.4c00087

CHEMISTRY OF MATERIALS   影响因子和分区

0897-4756

1520-5002

Here, we systematically investigated the pressure dependence of electronic transport and the crystal structure of GeTe using multiple methods under various hydrostatic conditions. The experiments indicated that a progressive structural evolution occurred from the ambient rhombohedral phase (space group [SG]: R3m) to the rock-salt phase (SG: Fm3m) and then to an orthorhombic phase (SG: Pnma). Above 50 GPa, we determined that GeTe developed into a body-centered cubic (bcc, SG: Im3m) structure, which consisted of a site-disordered alloy. An unambiguous correlation between superconductivity and phase transitions was observed in this compound, and the maximum superconducting transition temperature (T-c) was approximately 7.5 +/- 0.2 K at 30.0(1) GPa. Finally, the key effect of ionic size and charge transfer between the Ge and Te ions on the formation of site-disordered alloys in GeTe was discussed.

SCI ; EI

英语

通讯

National Natural Science Foundation of China[12104457]

Chemistry ; Materials Science

Chemistry, Physical ; Materials Science, Multidisciplinary

WOS:001200225700001

AMER CHEMICAL SOC

MATERIALS SCIENCE

Web of Science

1.Chinese Acad Sci, Inst High Energy Phys, Multidiscipline Res Ctr, Beijing 100049, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
3.Int Quantum Acad, Shenzhen 518048, Peoples R China
4.China Univ Polit Sci & Law, Dept Sci & Technol, Beijing 100088, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Cheng, Hu,Yao, Huanli,Xu, Yixuan,et al. Pressure-Induced Alloying and Superconductivity in GeTe[J]. CHEMISTRY OF MATERIALS,2024,36(8).

Cheng, Hu.,Yao, Huanli.,Xu, Yixuan.,Jiang, Jiayue.,Yang, Yiming.,...&Shao, Jifeng.(2024).Pressure-Induced Alloying and Superconductivity in GeTe.CHEMISTRY OF MATERIALS,36(8).

Cheng, Hu,et al."Pressure-Induced Alloying and Superconductivity in GeTe".CHEMISTRY OF MATERIALS 36.8(2024).