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Superconducting phase in the layered dichalcogenide 1T-TaS2 upon inhibition of the metal-insulator transition

P. Xu, J. O. Piatek, P.-H. Lin, B. Sipos, H. Berger, L. Forró, H. M. Rønnow, M. Grioni

DOI 10.1103/PhysRevB.81.172503 · Physical Review B

T1

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Abstract

When a Mott metal-insulator transition is inhibited by a small amount of disorder in the layered dichalcogenide 1T-TaS2, an inhomogeneous superconducting state arises below T=2.1 K and coexists with a nearly commensurate charge-density wave. By angle-resolved photoelectron spectroscopy, we show that it emerges from a bad metal state with strongly damped quasiparticles. Superconductivity is almost entirely suppressed by an external magnetic field of 0.1 T.

Source-reported materials — not catalogue approval

FormulaReported Tc (K)Pressure (GPa)Type
Ta1-xS2

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

2.1Pressure unresolvedmidpoint
Ta1-xS2

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

2.9Pressure unresolvedonset
NbSe2

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

7.2Pressure not reportedunknown

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