Superconducting order from disorder in 2H-TaSe 2− x S x
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Abstract
Abstract We report on the emergence of robust superconducting order in single crystal alloys of TaSe2− x S x (0 ≤ × ≤ 2). The critical temperature of the alloy is surprisingly higher than that of the two end compounds TaSe2 and TaS2. The evolution of superconducting critical temperature Tc(x) correlates with the full width at half maximum of the Bragg peaks and with the linear term of the high-temperature resistivity. The conductivity of the crystals near the middle of the alloy series is higher or similar than that of either one of the end members 2H-TaSe2 and/or 2H-TaS2. It is known that in these materials superconductivity is in close competition with charge density wave order. We interpret our experimental findings in a picture where disorder tilts this balance in favor of superconductivity by destroying the charge density wave order.
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Research context
OpenAlex topics: Organic and Molecular Conductors Research · Iron-based superconductors research · Physics of Superconductivity and Magnetism
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References (44)
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