Sankar Raman, Rao G Narsinga, Muthuselvam I Panneer, Chang Tay-Rong, Jeng H T, Murugan G Senthil, Lee Wei-Li, Chou F C
Institute of Physics, Academia Sinica, Taipei 11529, Taiwan. Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.
J Phys Condens Matter. 2017 Mar 8;29(9):095601. doi: 10.1088/1361-648X/aa4edb. Epub 2017 Jan 18.
The anisotropic superconducting properties of PbTaSe single crystal is reported. Superconductivity with T = 3.83 ± 0.02 K has been characterized fully with electrical resistivity ρ(T), magnetic susceptibility χ(T), and specific heat C (T) measurements using single crystal samples. The superconductivity is type-II with lower critical field H and upper critical field H of 65 and 450 Oe (H⊥ to the ab-plane), 140 and 1500 Oe (H|| to the ab-plane), respectively. These results indicate that the superconductivity of PbTaSe is anisotropic. The superconducting anisotropy, electron-phonon coupling λ , superconducting energy gap Δ, and the specific heat jump ΔC/γT at T confirms that PbTaSe can be categorized as a bulk superconductor.
报道了PbTaSe单晶的各向异性超导特性。利用单晶样品通过电阻率ρ(T)、磁化率χ(T)和比热C(T)测量对T = 3.83±0.02 K的超导性进行了全面表征。该超导性为II型，其下临界场Hc1和上临界场Hc2分别为65和450 Oe（H垂直于ab平面）、140和1500 Oe（H平行于ab平面）。这些结果表明PbTaSe的超导性是各向异性的。超导各向异性、电子-声子耦合λ、超导能隙Δ以及T时的比热跃变ΔC/γT证实PbTaSe可归类为体超导体。
