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

[1] Interplane coupling in the quasi-two-dimensional 1T-TaS2 -: art. no. 125105 [J].

Bovet, M ;

van Smaalen, S ;

Berger, H ;

Gaal, R ;

Forró, L ;

Schlapbach, L ;

Aebi, P .

PHYSICAL REVIEW B, 2003, 67 (12) :5

[2] Pseudogapped Fermi surfaces of 1T-TaS2 and 1T-TaSe2:: A charge density wave effect -: art. no. 125117 [J].

Bovet, M ;

Popovic, D ;

Clerc, F ;

Koitzsch, C ;

Probst, U ;

Bucher, E ;

Berger, H ;

Naumovic, D ;

Aebi, P .

PHYSICAL REVIEW B, 2004, 69 (12)

[3] Lattice-distortion-enhanced electron-phonon coupling and Fermi surface nesting in 1T-TaS2 [J].

Clerc, F. ;

Battaglia, C. ;

Bovet, M. ;

Despont, L. ;

Monney, C. ;

Cercellier, H. ;

Garnier, M. G. ;

Aebi, P. ;

Berger, H. ;

Forro, L. .

PHYSICAL REVIEW B, 2006, 74 (15)

[4] CORRELATED ELECTRONS IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].

DAGOTTO, E .

REVIEWS OF MODERN PHYSICS, 1994, 66 (03) :763-840

[5] Angle-resolved photoemission studies of the cuprate superconductors [J].

Damascelli, A ;

Hussain, Z ;

Shen, ZX .

REVIEWS OF MODERN PHYSICS, 2003, 75 (02) :473-541

[6] SPECTROSCOPIC SIGNATURES OF PHASE-TRANSITIONS IN A CHARGE-DENSITY-WAVE SYSTEM - 1T-TAS2 [J].

DARDEL, B ;

GRIONI, M ;

MALTERRE, D ;

WEIBEL, P ;

BAER, Y ;

LEVY, F .

PHYSICAL REVIEW B, 1992, 46 (12) :7407-7412

[7] Snapshots of cooperative atomic motions in the optical suppression of charge density waves [J].

Eichberger, Maximilian ;

Schaefer, Hanjo ;

Krumova, Marina ;

Beyer, Markus ;

Demsar, Jure ;

Berger, Helmuth ;

Moriena, Gustavo ;

Sciaini, German ;

Miller, R. J. Dwayne .

NATURE, 2010, 468 (7325) :799-802

[8] CHARGE CARRIER LOCALIZATION IN PURE AND DOPED 1T-TAS2 [J].

FAZEKAS, P ;

TOSATTI, E .

PHYSICA B & C, 1980, 99 (1-4) :183-187

[9] Charge- and spin-density waves in existing superconductors: competition between Cooper pairing and Peierls or excitonic instabilities [J].

Gabovich, AM ;

Voitenko, AI ;

Ausloos, M .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2002, 367 (06) :583-709

[10] Ultrafast Melting of a Charge-Density Wave in the Mott Insulator 1T-TaS2 [J].

Hellmann, S. ;

Beye, M. ;

Sohrt, C. ;

Rohwer, T. ;

Sorgenfrei, F. ;

Redlin, H. ;

Kallaene, M. ;

Marczynski-Buehlow, M. ;

Hennies, F. ;

Bauer, M. ;

Foehlisch, A. ;

Kipp, L. ;

Wurth, W. ;

Rossnagel, K. .

PHYSICAL REVIEW LETTERS, 2010, 105 (18)

← 1 2 3 4 →