Abstract
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 ab initio calculations are described. The commensurate crystal structure of Cu11Bi7is a unique variation of the NiAs structure type. Temperature-dependent electrical resistivity and heat capacity measurements reveal a bulk superconducting transition at Tc=1.36 K. Density functional theory calculations further demonstrate that Cu11Bi7can 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.
Original language | English (US) |
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Pages (from-to) | 13446-13449 |
Number of pages | 4 |
Journal | Angewandte Chemie - International Edition |
Volume | 55 |
Issue number | 43 |
DOIs | |
State | Published - Oct 17 2016 |
Keywords
- bismuth
- copper
- high-pressure synthesis
- intermetallics
- superconductivity
ASJC Scopus subject areas
- Catalysis
- Chemistry(all)