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Scientific article
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English

Robust zero resistance in a superconducting high-entropy alloy at pressures up to 190 GPa

Publication date2017-11-28
First online date2017-11-28
Abstract

We report the observation of extraordinarily robust zero-resistance superconductivity in the pressurized (TaNb)0.67(HfZrTi)0.33 high-entropy alloy--a material with a body-centered-cubic crystal structure made from five randomly distributed transition-metal elements. The transition to superconductivity (Tc) increases from an initial temperature of 7.7 K at ambient pressure to 10 K at ∼60 GPa, and then slowly decreases to 9 K by 190.6 GPa, a pressure that falls within that of the outer core of the earth. We infer that the continuous existence of the zero-resistance superconductivity from 1 atm up to such a high pressure requires a special combination of electronic and mechanical characteristics. This high-entropy alloy superconductor thus may have a bright future for applications under extreme conditions, and also poses a challenge for understanding the underlying quantum physics.

eng
Keywords
  • High pressure
  • High-entropy alloy
  • Superconductivity
Affiliation Not a UNIGE publication
Research group
Funding
  • Gordon and Betty Moore Foundation - [GBMF-4412]
Citation (ISO format)
GUO, Jing et al. Robust zero resistance in a superconducting high-entropy alloy at pressures up to 190 GPa. In: Proceedings of the National Academy of Sciences of the United States of America, 2017, vol. 114, n° 50, p. 13144–13147. doi: 10.1073/pnas.1716981114
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Article (Published version)
Identifiers
ISSN of the journal0027-8424
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Technical informations

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