Weak Interactions under Pressure: hp‐CuBi and Its Analogues. Issue 20 (3rd April 2017)

• Record Type: Journal Article
• Authors: Guo, Kai; Akselrud, Lev; Bobnar, Matej; Burkhardt, Ulrich; Schmidt, Marcus; Zhao, Jing‐Tai; Schwarz, Ulrich; Grin, Yuri
• Is Part Of: Angewandte Chemie international edition. Volume 56:Issue 20(2017)
• Page Start: 5620
• Page End: 5624
• Publication Date: 2017-04-03
• Subjects: bismuth -- copper -- high-pressure high-temperature synthesis -- nonpolar compounds -- superconductivity; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201700712
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: The metastable binary compound hp‐CuBi was obtained from the direct chemical reaction between copper and bismuth at a pressure of 5 GPa and a temperature of 720 K. The atomic arrangement comprises slabs of puckered Cu layers sandwiched between Bi planes. The QTAIM charges calculated for compounds of bismuth with transition metals reveal negligible charge transfer for hp‐CuBi. Analysis of the chemical bonding with position‐space techniques discloses multicenter interactions within the Bi‐Cu‐Bi slabs and lone‐pair interactions of the van der Waals type between these entities. hp‐CuBi exhibits metal‐type electrical conductivity with superconductivity below Tc =1.3 K. Abstract : The metastable binary compound hp ‐CuBi was prepared from copper and bismuth at 5 GPa and 720 K. The atomic arrangement consists of slabs of puckered Cu layers sandwiched between Bi planes. Analysis of the chemical bonding reveals multicenter interactions within and van der Waals type interactions between the slabs. The new compound is a superconductor below T c =1.3 K.