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

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

2010-04-19

arxiv.org/abs/1004.3251v1

Phys. Rev. B 81, 172503 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures

Scientific paper

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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