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 language | English (US) |
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Article number | 212201 |
Journal | Journal of Physics Condensed Matter |
Volume | 26 |
Issue number | 21 |
DOIs | |
State | Published - May 28 2014 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- General Materials Science
Keywords
- Meissner effect
- electronic band structure
- heat capacity
- resistivity
- superconducting properties