期刊
PHYSICAL REVIEW LETTERS
卷 109, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.176403
关键词
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资金
- JSPS
- JST-CREST
- MEXT of Japan
- National Key Basic Research of China [2011CBA00111]
- Grants-in-Aid for Scientific Research [24740215, 21340088, 10F00331] Funding Source: KAKEN
We have performed high-resolution angle-resolved photoemission spectroscopy of layered chalcogenide 1T-FexTa1-xS2 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.
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