Real-space coexistence of the melted Mott state and superconductivity in Fe-substituted 1T-TaS 2

R. Ang, Y. Tanaka, E. Ieki, K. Nakayama, T. Sato, L. J. Li, W. J. Lu, Y. P. Sun, T. Takahashi

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71 Citations (Scopus)

Abstract

We have performed high-resolution angle-resolved photoemission spectroscopy of layered chalcogenide 1T-Fe xTa 1-xS 2 which undergoes a superconducting transition in the nearly commensurate charge-density-wave phase (melted Mott phase). We found a single electron pocket at the Brillouin-zone center in the melted Mott phase, which is created by the backfolding of bands due to the superlattice potential of charge-density-wave. This electron pocket appears in the x region where the samples show superconductivity, and is destroyed by the Mott- and Anderson-gap opening. Present results suggest that the melted Mott state and the superconductivity coexist in real space, providing a new insight into the interplay between electron correlation, charge order, and superconductivity.

Original languageEnglish
Article number176403
JournalPhysical review letters
Volume109
Issue number17
DOIs
Publication statusPublished - 2012 Oct 23

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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