title: Superconducting properties and electronic structure of NaBi.
abstract: Resistivity, dc magnetization, and heat capacity measurements are reported for superconducting NaBi. T(c), the electronic contribution to the specific heat γ, the ΔC(p)/γT(c) ratio, and the Debye temperature are found to be 2.15 K, 3.4 mJ mol(-1) K(-2), 0.78, and 140 K respectively. The calculated electron-phonon coupling constant (λ(ep) = 0.62) implies that NaBi is a moderately coupled superconductor. The upper critical field and coherence length are found to be 250 Oe and 115 nm, respectively. Electronic structure calculations show NaBi to be a good metal, in agreement with the experiments; the p(x) and p(y) orbitals of Bi dominate the electronic states at the Fermi Energy.
authors.affiliation: Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.
authors.forename: S K
authors.initials: SK
authors.lastname: Kushwaha
authors.forename: J W
authors.initials: JW
authors.lastname: Krizan
authors.forename: J
authors.initials: J
authors.lastname: Xiong
authors.forename: T
authors.initials: T
authors.lastname: Klimczuk
authors.forename: Q D
authors.initials: QD
authors.lastname: Gibson
authors.forename: T
authors.initials: T
authors.lastname: Liang
authors.forename: N P
authors.initials: NP
authors.lastname: Ong
authors.forename: R J
authors.initials: RJ
authors.lastname: Cava
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D004553:Electric Conductivity; D004583:Electrons; D006358:Hot Temperature; D008280:Magnetics; D008956:Models, Chemical; D060739:Phonons; D012964:Sodium / Q000737:chemistry*; D013696:Temperature
chemical_list: D012964:Sodium; D001729:Bismuth