Effect of electron count and chemical complexity in the Ta-Nb-Hf-Zr-Ti high-entropy alloy superconductor

Fabian Von Rohr, Michał J. Winiarski, Jing Tao, Tomasz Klimczuk, Robert Joseph Cava

Research output: Contribution to journalArticle

31 Scopus citations

Abstract

High-entropy alloys are made from random mixtures of principal elements on simple lattices, stabilized by a high mixing entropy. The recently discovered body-centered cubic (BCC) Ta-Nb-Hf-Zr-Ti high-entropy alloy superconductor appears to display properties of both simple crystalline intermetallics and amorphous materials; e.g., it has a well-defined superconducting transition along with an exceptional robustness against disorder. Here we show that the valence electron count dependence of the superconducting transition temperature in the high-entropy alloy falls between those of analogous simple solid solutions and amorphous materials and test the effect of alloy complexity on the superconductivity. We propose high-entropy alloys as excellent intermediate systems for studying superconductivity as it evolves between crystalline and amorphous materials.

Original languageEnglish (US)
Pages (from-to)E7144-E7150
JournalProceedings of the National Academy of Sciences of the United States of America
Volume113
Issue number46
DOIs
StatePublished - Nov 15 2016

All Science Journal Classification (ASJC) codes

  • General

Keywords

  • Disordered metals
  • High-entropy alloys
  • Superconductivity

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