paper

Multiband superconductivity in Ta $_{4}$ Pd $_{3}$ Te $_{16}$ with anisotropic gap structure

arXiv:1501.03585 · doi:10.1088/0953-8984/27/32/325701

Abstract

We carried out the measurements of magnetoresistance, magnetic susceptibility and specific heat on crystals of the low-dimensional transition metal telluride Ta $_{4}$ Pd $_{3}$ Te $_{16}$ . Our results indicate that Ta $_{4}$ Pd $_{3}$ Te $_{16}$ is an anisotropic type-II superconductor with the extracted Ginzburg-Landau parameter $I^º_{GL} =$ 84. The upper critical field $H_{c 2}$ ( $T$ ) shows a linear dependence at low temperature and the anisotropy of $H_{c 2}$ ( $T$ ) is strongly $T$ -dependent, both of which indicate a multiband scenario. A detailed analysis reveals that the electronic specific heat $C_{el}$ ( $T$ ) can be consistently described by a two-gap ( $s$ + $d$ waves) model from the base temperature $T / T_{c} \sim$ 0.12 up to $T_{c}$ . Our data suggests multiband superconductivity in Ta $_{4}$ Pd $_{3}$ Te $_{16}$ with anisotropic gap structure.

6 pages, 4 figures

Multiband superconductivity in Ta4​Pd3​Te16​ with anisotropic gap structure

Abstract

Multiband superconductivity in Ta $_{4}$ Pd $_{3}$ Te $_{16}$ with anisotropic gap structure