Anomalous Pressure Dependence of the Superconducting Transition Temperature in TlNi${}_2$Se${}_{2-x}$S${}_x$

Abstract

We report the pressure dependence of the superconducting transition temperature, $T_c$, in TlNi${}_2$Se${}_{2-x}$S${}_x$ detected via the AC susceptibility method. The pressure-temperature phase diagram constructed for TlNi${}_2$Se${}_2$, TlNi${}_2$S${}_2$ and TlNi${}_2$SeS 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 $T_c$ for TlNi${}_2$SeS. 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 TlNi${}_2$Se${}_{2-x}$S${}_x$ system.

arXiv comment4 pages, 3 figures

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Cited by in corpus (5)

• Two types of superconducting domes in unconventional superconductors
• Nearly isotropic superconductivity in layered Weyl semimetal WTe${}_2$ at 98.5 kbar
• Camelback-shaped band reconciles heavy electron behavior with weak electronic Coulomb correlations in superconducting TlNi2Se2
• Superconductivity and Disorder Effect in TlNi${}_2$Se${}_{2-x}$S${}_x$ crystals
• Unconventional superconductivity in the nickel-chalcogenide superconductor, TlNi${}_2$Se${}_2$