High entropy alloy superconductors -- status, opportunities and challenges

Abstract

High entropy alloys (HEAs) are a recently-opened research area in materials science and condensed matter physics. Although 3d-metal-based HEAs have already been the subject of many investigations, studies of HEA superconductors, which tend to be based on 4d metals, are relatively fewer. Here we provide a short update of the progress made in studies of superconducting HEAs. We aim to summarize their current status and describe some of the key factors that appear to influence their superconducting transition temperatures and properties, including crystal structure, atomic makeup, valence electron count, molar volume and mixing entropy. Many opportunities and challenges remain for expanding our knowledge of HEA superconductors, finding new types of HEA superconductors, and their potential for applications; these are also briefly discussed.

32 pages, 5 figures

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Cited by in corpus (36)

• High-entropy van der Waals materials formed from mixed metal dichalcogenides, halides and phosphorus trisulfides
• Superconductivity in CuAl2-type Co0.2Ni0.1Cu0.1Rh0.3Ir0.3Zr2 with a high-entropy-alloy transition metal site
• Superconductivity in High-Entropy-Alloy Telluride AgInSnPbBiTe5
• Synthesis of new high-entropy alloy-type Nb3 (Al, Sn, Ge, Ga, Si) superconductors
• Superconducting properties of high-entropy-alloy tellurides M-Te (M: Ag, In, Cd, Sn, Sb, Pb, Bi) with a NaCl-type structure
• Polymorphism and superconductivity in the V-Nb-Mo-Al-Ga high-entropy alloys
• Synthesis of high-entropy-alloy-type superconductors (Fe,Co,Ni,Rh,Ir)Zr2 with tunable transition temperature
• Superconducting and normal state properties of high entropy alloy Nb-Re-Hf-Zr-Tiinvestigated by muon spin relaxation and rotation
• Record high $T_{\mathrm{c}}$ and robust superconductivity in transition metal $\delta$-Ti phase at megabar pressure
• Preparation and Characterization of High-Entropy Alloy (TaNb)${}_{1-x}$(ZrHfTi)${}_x$ Superconducting Films
• Superconductivity with large upper critical field in noncentrosymmetric Cr-bearing high-entropy alloys
• Anomalous broadening of specific heat jump at Tc in high-entropy-alloy-type superconductor TrZr2
• Fishtail effect and the vortex phase diagram of high-entropy alloy superconductor
• Boron based new high entropy alloy superconductor Mo0.11W0.11V0.11Re0.34B0.33
• Superconductivity in HEA-type compounds
• Probing the superconducting ground state of noncentrosymmetric high entropy alloys using muon-spin rotation and relaxation
• RSAVS superconductors: materials with a superconducting state that is robust against large volume shrinkage
• First-principles study of the robust superconducting state of NbTi alloys under ultrahigh pressures
• Visualizing the multifractal wavefunctions of a disordered two-dimensional electron gas
• Improvement of local critical current density of REBa2Cu3O7-d by the increase in configurational entropy of mixing at the RE site
• Deep Learning Based Superconductivity: Prediction and Experimental Tests
• Superconductivity of high-entropy-alloy-type transition-metal zirconide (Fe,Co,Ni,Cu,Ga)Zr2
• Magnetism in Metastable and Annealed Compositionally Complex Alloys
• Superconductivity in High-Entropy Antimonide M${}_{1-x}$Pt${}_x$Sb (M = equimolar Ru, Rh, Pd, and Ir)
• Comparative studies on unconventional superconductivity in Cr${}_3$Ru compounds with bcc and A15 structures
• Electronic structure-property relationship in an Al0.5TiZrPdCuNi high-entropy alloy
• Uniform electronic states and $s$-wave superconductivity in a strongly disordered high-entropy compound (RuRhPdIr)${}_{0.6}$Pt${}_{0.4}$Sb
• Extreme disorder in crystalline perovskite oxide: a new paradigm in quantum materials research
• Unconventional superconductivity in Sc${}_2$Ir${}_{4-x}$Si${}_x$ by spin-orbit coupling driven flat band
• Superconductivity in Compositionally-Complex Cuprates with the YBa${}_2$Cu${}_3$O${}_{7-x}$ Structure
• Growth of REBa2Cu3Ox single-crystal whiskers utilizing the concept of high-entropy alloys
• Estimation of Grüneisen parameter of high-entropy-alloy-type functional materials
• Unraveling the role of disorder in the electronic structure of high entropy alloys
• Long-range magnetic order with disordered spin orientations in a high-entropy antiferromagnet
• Robustness of superconductivity to external pressure in high-entropy-alloy-type metal telluride AgInSnPbBiTe5
• Stabilizing charge density wave by mixing transition metal elements in monolayer XS${}_2$ with trigonal-prismatic coordination