High-entropy silicide superconductors with W5Si3-type structure

Bin Liu, Wuzhang Yang, Guorui Xiao, Qinqing Zhu, Shijie Song, Guang-Han Cao, and Zhi Ren
Phys. Rev. Materials 7, 014805 – Published 31 January 2023
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Abstract

We report the synthesis, crystal structure, and physical properties of two new high-entropy silicides (HESs), namely (Nb0.1Mo0.3W0.3Re0.2Ru0.1)5Si3 and (Nb0.2Mo0.3W0.3Re0.1Ru0.1)5Si3. Structural analysis indicates that both HESs consist of a (nearly) single tetragonal W5Si3-type phase (space group I4/mcm) with a disordered cation distribution. Electrical resistivity, magnetic susceptibility, and specific heat measurements show that (Nb0.1Mo0.3W0.3Re0.2Ru0.1)5Si3 and (Nb0.2Mo0.3W0.3Re0.1Ru0.1)5Si3 are weakly coupled bulk superconductors, which represent the first superconducting high-entropy nonoxide ceramics. In particular, these HESs have higher Tc values (3.2–3.3 K) compared with those of the binary counterparts and their Bc2(0)/Tc ratios are the largest among superconductors of the same structural type.

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  • Received 20 November 2022
  • Revised 29 December 2022
  • Accepted 10 January 2023

DOI:https://doi.org/10.1103/PhysRevMaterials.7.014805

©2023 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Bin Liu1,*, Wuzhang Yang2,3,5, Guorui Xiao2,3,4, Qinqing Zhu2,3,5, Shijie Song4, Guang-Han Cao4, and Zhi Ren2,3,†

  • 1Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650000, People's Republic of China
  • 2Department of Physics, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, People's Republic of China
  • 3Institute of Natural Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou, 310024, Zhejiang Province, People's Republic of China
  • 4School of Physics, Zhejiang University, Hangzhou 310058, People's Republic of China
  • 5Department of Physics, Fudan University, Shanghai 200433, People's Republic of China

  • *bliu0201@foxmail.com
  • renzhi@westlake.edu.cn

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Issue

Vol. 7, Iss. 1 — January 2023

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