title: Weak Interactions under Pressure: hp-CuBi and Its Analogues.
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.
authors.affiliation: School of Materials Science and Engineering, Shanghai University, China.|Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, 01187, Dresden, Germany.
authors.forename: Kai
authors.initials: K
authors.lastname: Guo
authors.affiliation: Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, 01187, Dresden, Germany.
authors.forename: Lev
authors.initials: L
authors.lastname: Akselrud
authors.affiliation: Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, 01187, Dresden, Germany.
authors.forename: Matej
authors.initials: M
authors.lastname: Bobnar
authors.affiliation: Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, 01187, Dresden, Germany.
authors.forename: Ulrich
authors.initials: U
authors.lastname: Burkhardt
authors.affiliation: Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, 01187, Dresden, Germany.
authors.forename: Marcus
authors.initials: M
authors.lastname: Schmidt
authors.affiliation: School of Materials Science and Engineering, Shanghai University, China.|State Key Laboratory of Advanced Special Steel, Shanghai University, China.
authors.forename: Jing-Tai
authors.initials: JT
authors.lastname: Zhao
authors.affiliation: Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, 01187, Dresden, Germany.
authors.forename: Ulrich
authors.initials: U
authors.lastname: Schwarz
authors.affiliation: Chemische Metallkunde, Max-Planck-Institut für Chemische Physik fester Stoffe, 01187, Dresden, Germany.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Grin
keywords: bismuth; copper; high-pressure high-temperature synthesis; nonpolar compounds; superconductivity