Superconductivity in High-Entropy Antimonide M${}_{1-x}$Pt${}_x$Sb (M = equimolar Ru, Rh, Pd, and Ir)

Abstract

The high-entropy concept was applied to the synthesis of transition-metal antimonides, M1-xPtxSb (M = equimolar Ru, Rh, Pd, and Ir). High-entropy antimonide samples crystallized in a pseudo-hexagonal NiAs-type crystal structure with a P63/mmc space group were successfully synthesized through a conventional solid-state reaction and subsequent quenching. A detailed investigation of the composition and equilibration conditions confirmed the reversible phase transition between a multi-phase state at low temperature and an entropy-driven single-phase solid solution at high temperatures. Electrical resistivity, magnetization, and heat capacity measurements of single-phase M1-xPtxSb (x = 0.2) samples revealed a bulk superconducting transition at 2.15(2) K. This study demonstrates that the high-entropy concept provides numerous opportunities for the discovery of new functional materials such as superconductors.

arXiv comment13 pages, 6+2 figures, 1+2 tables

References in corpus (8)

• Saturation of electrical resistivity
• Universality of the Mott-Ioffe-Regel limit in metals
• Effect of Electron Count and Chemical Complexity in the Ta-Nb-Hf-Zr-Ti High-Entropy Alloy Superconductor
• High entropy alloy superconductors -- status, opportunities and challenges
• High-entropy van der Waals materials formed from mixed metal dichalcogenides, halides and phosphorus trisulfides
• Superconductivity in Layered Pnictides BaRh2P2 and BaIr2P2
• Metal-insulator transition and superconductivity induced by Rh doping in binary Ru Pnictides RuPn (Pn = P, As and Sb)
• MgPd${}_2$Sb -- the first Mg-based Heusler-type superconductor

Cited by in corpus (2)

• Uniform electronic states and $s$-wave superconductivity in a strongly disordered high-entropy compound (RuRhPdIr)${}_{0.6}$Pt${}_{0.4}$Sb
• Superconductivity in Compositionally-Complex Cuprates with the YBa${}_2$Cu${}_3$O${}_{7-x}$ Structure