期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 55, 期 43, 页码 13446-13449出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201605902
关键词
bismuth; copper; high-pressure synthesis; intermetallics; superconductivity
资金
- DARPA [W911NF15100069]
- AFOSR [FA95501410358]
- NSF [EAR-1128799]
- DOE [DE-FG02-94ER14466]
- NSF GRFP [DGE-1324585]
- Novartis Universitat Basel Excellence Scholarship for Life Sciences
- Swiss National Supercomputing Center in Lugano [s499, s621]
A new intermetallic compound, the first to be structurally identified in the Cu-Bi binary system, is reported. This compound is accessed by high-pressure reaction of the elements. Its detailed characterization, physical property measurements, and abinitio calculations are described. The commensurate crystal structure of Cu11Bi7 is a unique variation of the NiAs structure type. Temperature-dependent electrical resistivity and heat capacity measurements reveal a bulk superconducting transition at T-c=1.36K. Density functional theory calculations further demonstrate that Cu11Bi7 can be stabilized (relative to decomposition into the elements) at high pressure and temperature. These results highlight the ability of high-pressure syntheses to allow for inroads into heretofore-undiscovered intermetallic systems for which no thermodynamically stable binaries are known.
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