The synthesis and crystallographic, thermodynamic and transport properties of single crystalline Rh9In4S4 were studied. The resistivity, magnetization and specific heat measurements all clearly indicate bulk superconductivity with a critical temperature, Tc∼ 2.25 K. The Sommerfeld coefficient γ and the Debye temperature(ΘD) were found to be 34 mJ mol−1 K−2 and 217 K respectively. The observed specific heat jump, ΔC/γTc = 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, λGL≈ 5750\AA, to the GL-coherence length, ξGL≈ 94\AA, is large: κ∼ 60. Furthermore, we observed a peak effect in the resistivity measurement as a function of both temperature and magnetic field.
@article{arxiv.1601.07948,
title = {Superconducting properties of Rh$_{9}$In$_4$S$_4$ single crystals},
author = {Udhara S. Kaluarachchi and Qisheng Lin and Weiwei Xie and Valentin Taufour and Sergey L. Bud'ko and Gordon J. Miller and Paul C. Canfield},
journal= {arXiv preprint arXiv:1601.07948},
year = {2016}
}