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arXiv · 1004.3251

Occurrence of superconductivity when the metal-insulator transition is inhibited in $1T$-TaS${_2}$

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

When a Mott metal-insulator transition is inhibited by a small amount of disorder in the layered dichalcogenide 1T-TaS$_2$, an inhomogeneous superconducting state arises below T=2.1 K, and coexists with a nearly-commensurate charge-density-wave. By angle-resolved photoelectron spectroscopy (ARPES) 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.

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P. Xu, J. O. Piatek, P. -H. Lin, B. Sipos, H. Berger, L. Forró, H. M. Rønnow, M. Grioni. 2010-04-19. Occurrence of superconductivity when the metal-insulator transition is inhibited in $1T$-TaS${_2}$. https://arxiv.org/abs/1004.3251

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