Giant Reduction of Stabilized Pressure for the Superconducting Re0.8V0.2Se2 Phase

Can Tian; Yiping Gao; Xiaoli Huang; Yuqiang Fang; Fuqiang Huang; Tian Cui

doi:10.1021/acs.inorgchem.3c01371

Giant Reduction of Stabilized Pressure for the Superconducting Re_0.8V_0.2Se₂ Phase

Inorg Chem. 2023 Jul 24;62(29):11626-11632. doi: 10.1021/acs.inorgchem.3c01371. Epub 2023 Jul 11.

Authors

Can Tian¹, Yiping Gao¹, Xiaoli Huang¹, Yuqiang Fang², Fuqiang Huang², Tian Cui^{1

3}

Affiliations

¹ State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.
² State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
³ School of Physical Science and Technology, Ningbo University, Ningbo 315211, China.

PMID: 37431752
DOI: 10.1021/acs.inorgchem.3c01371

Abstract

Access to new superconducting phases in transition-metal dichalcogenides (TMDs) via pressure treatment has been the primary target in this field. As equally essential as the fabrication of new superconducting materials at high pressure, maneuvering new superconducting phases at moderate pressures is also one of the core goals in the synthesis community. Here, we successfully reduced the synthesized pressure of the superconducting phase in ReSe₂ by combining V-doping and high-pressure techniques, with a reduction in pressure of 50% in contrast to ReSe₂. Our electrical transport measurements displayed that metallization appeared at 10 GPa and subsequently superconductivity appeared at about 52.4 GPa with T_c ∼ 1.9 K. There was a giant reduction in the stable pressure of the superconducting phase derived from the d-electrons and interlayer interaction changes, as evidenced by the Hall effect and X-ray diffraction measurements. These findings serve as ideal starting points and guidance for designing superconducting TMDs at moderate pressures.