Real-Space Coexistence of the Melted Mott State and Superconductivity in Fe-Substituted 1T-TaS2

被引：120
作者：
Ang, R. [1 ]
Tanaka, Y. [2 ]
Ieki, E. [2 ]
Nakayama, K. [2 ]
Sato, T. [2 ]
Li, L. J. [3 ]
Lu, W. J. [3 ]
Sun, Y. P. [3 ,4 ]
Takahashi, T. [1 ,2 ]
机构：
[1] Tohoku Univ, Adv Inst Mat Res, WPI Res Ctr, Sendai, Miyagi 9808577, Japan
[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan
[3] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
[4] Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 17期
关键词：
CHARGE-DENSITY WAVES; PHASE-TRANSITIONS; BAND-STRUCTURES; FERMI-SURFACE; SYSTEM;
D O I：
10.1103/PhysRevLett.109.176403
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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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页数：5
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