期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 114, 期 50, 页码 13144-13147出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1716981114
关键词
superconductivity; high pressure; high-entropy alloy
资金
- National Key Research and Development Program of China [2017YFA0302900, 2016YFA0300300, 2017YFA0303103]
- NSF of China [91321207, 11427805, U1532267, 11604376]
- Chinese Academy of Sciences [XDB07020300]
- Gordon and Betty Moore Foundation EPiQS initiative [GBMF-4412]
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 (T-C) increases from an initial temperature of 7.7 K at ambient pressure to 10 K at similar to 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.
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