Observation of superconductivity in pressurized 2M WSe2 crystals

Yuqiang Fang; Qing Dong; Jie Pan; Hanyu Liu; Pan Liu; Yiyang Sun; Quanjun Li; Wei Zhao; Bingbing Liu; Fuqiang Huang

doi:10.1039/C9TC02417D

Observation of superconductivity in pressurized 2M WSe₂ crystals†

Yuqiang Fang,‡^ab Qing Dong,‡^c Jie Pan,‡^d Hanyu Liu,^c Pan Liu,

^e Yiyang Sun,

^a Quanjun Li,

^c Wei Zhao,*^a Bingbing Liu

*^c and Fuqiang Huang

*^af

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* Corresponding authors

^a State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, P. R. China
E-mail: huangfq@mail.sic.ac.cn

^b University of Chinese Academy of Sciences, Beijing 100049, China

^c State Key Laboratory of Superhard Materials, Jilin University, Changchun 120012, China

^d Department of Materials Science and Engineering, City University of Hong Kong, China

^e State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China

^f State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

Abstract

In this communication, we report a new-phase 2M WSe₂ with a monoclinic space group C2/m. 2M WSe₂ presents a metallic behavior under ambient pressure and shows a superconducting transition with a maximum T_c of 7.3 K at 10.7 GPa, which arises from the enhanced density of states near the Fermi surface upon pressurization.

Journal of Materials Chemistry C

Observation of superconductivity in pressurized 2M WSe₂ crystals†

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Observation of superconductivity in pressurized 2M WSe₂ crystals

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Journal of Materials Chemistry C