Superconducting properties and electronic structure of NaBi

S. K. Kushwaha, J. W. Krizan, J. Xiong, T. Klimczuk, Q. D. Gibson, T. Liang, N. P. Ong, R. J. Cava

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Abstract

Resistivity, dc magnetization, and heat capacity measurements are reported for superconducting NaBi. Tc, the electronic contribution to the specific heat γ, the ΔCp/γTc 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 (λep = 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 px and py orbitals of Bi dominate the electronic states at the Fermi Energy.

Original languageEnglish (US)
Article number212201
JournalJournal of Physics Condensed Matter
Volume26
Issue number21
DOIs
StatePublished - May 28 2014

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Keywords

  • Meissner effect
  • electronic band structure
  • heat capacity
  • resistivity
  • superconducting properties

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    Kushwaha, S. K., Krizan, J. W., Xiong, J., Klimczuk, T., Gibson, Q. D., Liang, T., Ong, N. P., & Cava, R. J. (2014). Superconducting properties and electronic structure of NaBi. Journal of Physics Condensed Matter, 26(21), [212201]. https://doi.org/10.1088/0953-8984/26/21/212201