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arXiv · 1601.07948

Superconducting properties of Rh$_{9}$In$_4$S$_4$ single crystals

Udhara S. Kaluarachchi·Qisheng Lin·Weiwei Xie·Valentin Taufour·Sergey L. Bud'ko·Gordon J. Miller·Paul C. Canfield
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Abstract

The synthesis and crystallographic, thermodynamic and transport properties of single crystalline Rh$_{9}$In$_4$S$_4$ were studied. The resistivity, magnetization and specific heat measurements all clearly indicate bulk superconductivity with a critical temperature, $T_{c}\sim$ 2.25 K. The Sommerfeld coefficient $\gamma$ and the Debye temperature($\varTheta_{\textrm{D}}$) were found to be 34 mJ mol$^{-1}$ K$^{-2}$ and 217 K respectively. The observed specific heat jump, $\Delta C/\gamma T_{c}$ = 1.66, is larger than the expected BCS weak coupling value of 1.43. Ginzburg-Landau (GL) ratio of the low temperature GL-penetration depth, $\lambda_\text{GL}$$\approx$ 5750\AA, to the GL-coherence length, $\xi_\text{GL}$$\approx$ 94\AA, is large: $\kappa$ $\sim$ 60. Furthermore, we observed a peak effect in the resistivity measurement as a function of both temperature and magnetic field.

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Udhara S. Kaluarachchi, Qisheng Lin, Weiwei Xie, Valentin Taufour, Sergey L. Bud'ko, Gordon J. Miller, Paul C. Canfield. 2016-01-28. Superconducting properties of Rh$_{9}$In$_4$S$_4$ single crystals. https://doi.org/10.1103/physrevb.93.094524

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