4 years ago

Weak Interactions under Pressure: hp-CuBi and Its Analogues

Weak Interactions under Pressure: hp-CuBi and Its Analogues
Kai Guo, Lev Akselrud, Jing-Tai Zhao, Ulrich Schwarz, Ulrich Burkhardt, Matej Bobnar, Marcus Schmidt, Yuri Grin
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. 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 Tc=1.3 K.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201700712

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