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

Fabian von Rohr; Michał Jerzy Winiarski; Jing Tao; Tomasz Klimczuk; Robert J. Cava

doi:10.1073/pnas.1615926113

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

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 showthat 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.

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Authors (5)

Fabian von Rohr
- Princeton University Department of Chemistry
Michał Jerzy Winiarski dr inż.
Jing Tao
- Brookhaven National Laboratory Condensed Matter Physics Department
Tomasz Klimczuk prof. dr hab. inż.
Robert J. Cava
- Princeton University Department of Chemistry

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA no. 113, edition 46, pages 7144 - 7150,
ISSN: 0027-8424
Language:: English
Publication year:: 2016
Bibliographic description:: Rohr F., Winiarski M., Tao J., Klimczuk T., Cava R.: Effect of electron count and chemical complexity in the Ta-Nb-Hf-Zr-Ti high-entropy alloy superconductor// PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. -Vol. 113, iss. 46 (2016), s.7144-7150
DOI:: Digital Object Identifier (open in new tab) 10.1073/pnas.1615926113
Verified by:: Gdańsk University of Technology