Superconducting Properties of BaBi${}_3$

Abstract

We report the superconducting properties of single crystals of the intermetallic perovskite-related compound BaBi${}_3$. The superconducting transition temperature ($T_c=5.82$~K) was obtained from heat capacity measurements. Using the measured values for the critical fields $H_{c1},H_{c2}$, and the specific heat $C$, we estimate the thermodynamic critical field $H_c$(0), coherence length $\xi$(0), Debye temperature ${\Theta }_D$ and coupling constant ${\lambda }_{ep}$. $\Delta C/\gamma T_c$ and ${\lambda }_{ep}$ suggest that BaBi${}_3$ is a moderately coupled superconductor and $\gamma$ suggests an enhanced density of states at the Fermi level. Electronic band structure calculations show a complex Fermi surface and a moderately high DOS at the Fermi level. Further analysis of the electronic specific heat shows that the superconducting properties are dominated by s-wave gap.

6 pages, 4 figures, 1 table. arXiv admin note: text overlap with arXiv:1402.4440

References in corpus (3)

• Physical properties of the noncentrosymmetric superconductor Mg_10Ir_19B_16
• Superconductivity at 5.4 K in $\beta$-Bi${}_2$Pd
• Superconducting state in the metastable binary bismuthide Rh3Bi14 single crystals

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• Characterization of the Heavy Metal Pyrochlore Lattice Superconductor CaIr2
• Ir d-band Derived Superconductivity in the Lanthanum-Iridium System LaIr3