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arXiv · 1301.4135

Superconductivity and Strong Non-Fermi-Liquid Behavior in Single-Crystal Ir3Te8

L. Li·T. F. Qi·L. S. Lin·X. X. Wu·X. T. Zhang·K. Butrouna·V. S. Cao·Y. H. Zhang·Jiangping Hu·P. Schlottmann·L. E. Delong·G. Cao
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Abstract

We observe superconductivity below a critical temperature TC = 1.8 K in single-crystal Ir3Te8, which also exhibits normal-state diamagnetism and a linear temperature dependence of electrical resistivity for a wide temperature interval, 20 K < T < 700 K. Single-crystal Ir3Te8 also undergoes a structural phase transition at TS = 350 K from a cubic (above TS) to a rhombohedral lattice below TS. Our first-principles electronic structure calculations reveal two bands crossing the Fermi level; despite the three-dimensional lattice, one band is quasi-two-dimensional, and is responsible for the observed diamagnetism and structure transition. The strong non-Fermi-liquid behavior characterized by the observed linearity in resistivity in such a nonmagnetic state suggests novel physics in this newly discovered superconductor.

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L. Li, T. F. Qi, L. S. Lin, X. X. Wu, X. T. Zhang, K. Butrouna, V. S. Cao, Y. H. Zhang, Jiangping Hu, P. Schlottmann, L. E. Delong, G. Cao. 2013-01-28. Superconductivity and Strong Non-Fermi-Liquid Behavior in Single-Crystal Ir3Te8. https://arxiv.org/abs/1301.4135

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