Anomalous Pressure Dependence of the Superconducting Transition Temperature in TlNiSeS
arXiv:1410.2506 · doi:10.1103/PhysRevB.90.201105
Abstract
We report the pressure dependence of the superconducting transition temperature, , in TlNiSeS detected via the AC susceptibility method. The pressure-temperature phase diagram constructed for TlNiSe, TlNiS and TlNiSeS exhibits two unexpected features: (a) a sudden collapse of the superconducting state at moderate pressure for all three compositions and (b) a dome-shaped pressure dependence of for TlNiSeS. These results point to the nontrivial role of S substitution and its subtle interplay with applied pressure, as well as novel superconducting properties of the TlNiSeS system.
4 pages, 3 figures
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