Publications Repository - Gdańsk University of Technology

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.

Authors

• S. K. Kushwaha,
• J. W. Krizan,
• J. Xiong,
• prof. dr hab. inż. Tomasz Klimczuk link open in new tab ,
• Q. D. Gibson,
• T. Liang,
• N.p. Ong,
• R. J. Cava