Discovery of a Superconducting Cu-Bi Intermetallic Compound by High-Pressure Synthesis
- Northwestern Univ., Evanston, IL (United States). Dept. of Chemistry
- Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
- Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources
- Univ. Basel (Switzerland). Dept. of Physics
A new intermetallic compound, the first to be structurally identified in the Cu–Bi binary system, is reported herein. 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 Cu11Bi7 is 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 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.
- Research Organization:
- Northwestern Univ., Evanston, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Organization:
- Defense Advanced Research Projects Agency (DARPA); US Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); Swiss National Science Foundation (SNF); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- Grant/Contract Number:
- FG02-94ER14466; FG02-07ER46433; AC02-06CH11357; AC02-05CH11231; W911NF15100069; FA95501410358; EAR-1128799; DGE-1324585; NNCI-1542205
- OSTI ID:
- 1596770
- Journal Information:
- Angewandte Chemie (International Edition), Vol. 55, Issue 43; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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