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.

引用

页数：5

共 32 条

[21] Remnant fermi surface in the presence of an underlying instability in layered 1T-TaS2 [J].

Pillo, T ;

Hayoz, J ;

Berger, H ;

Grioni, M ;

Schlapbach, L ;

Aebi, P .

PHYSICAL REVIEW LETTERS, 1999, 83 (17) :3494-3497

[22] Interplay between electron-electron interaction and electron-phonon coupling near the Fermi surface of 1T-TaS2 [J].

Pillo, T ;

Hayoz, J ;

Berger, H ;

Fasel, R ;

Schlapbach, L ;

Aebi, P .

PHYSICAL REVIEW B, 2000, 62 (07) :4277-4287

[23] Angle-resolved photoemission spectroscopy of the insulating NaxWO3:: Anderson localization, polaron formation, and remnant Fermi surface -: art. no. 147603 [J].

Raj, S ;

Hashimoto, D ;

Matsui, H ;

Souma, S ;

Sato, T ;

Takahashi, T ;

Sarma, DD ;

Mahadevan, P ;

Oishi, S .

PHYSICAL REVIEW LETTERS, 2006, 96 (14)

[24] Spin-orbit coupling in the band structure of reconstructed 1T-TaS2 [J].

Rossnagel, K ;

Smith, NV .

PHYSICAL REVIEW B, 2006, 73 (07)

[25]

SCRUBY CB, 1975, PHILOS MAG, V31, P255, DOI 10.1080/14786437508228930

[26] From Mott state to superconductivity in 1T-TaS2 [J].

Sipos, B. ;

Kusmartseva, A. F. ;

Akrap, A. ;

Berger, H. ;

Forro, L. ;

Tutis, E. .

NATURE MATERIALS, 2008, 7 (12) :960-965

[27] BAND STRUCTURES OF THE LAYER COMPOUNDS 1T-TAS2 AND 2H-TASE2 IN THE PRESENCE OF COMMENSURATE CHARGE-DENSITY WAVES [J].

SMITH, NV ;

KEVAN, SD ;

DISALVO, FJ .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1985, 18 (16) :3175-3189

[28] X-ray crystal-structure refinement of the nearly commensurate phase of 1T-TaS2 in (3+2)-dimensional superspace [J].

Spijkerman, A ;

deBoer, JL ;

Meetsma, A ;

Wiegers, GA ;

vanSmaalen, S .

PHYSICAL REVIEW B, 1997, 56 (21) :13757-13767

[29] SCANNING-TUNNELING-MICROSCOPY OF THE CHARGE-DENSITY-WAVE STRUCTURE IN 1T-TAS2 [J].

THOMSON, RE ;

BURK, B ;

ZETTL, A ;

CLARKE, J .

PHYSICAL REVIEW B, 1994, 49 (24) :16899-16916

[30] CHARGE-DENSITY WAVES AND SUPERLATTICES IN METALLIC LAYERED TRANSITION-METAL DICHALCOGENIDES [J].

WILSON, JA ;

DISALVO, FJ ;

MAHAJAN, S .

ADVANCES IN PHYSICS, 1975, 24 (02) :117-201

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