Nature of charge density waves and superconductivity in 1T-TaSe2-xTex

被引：94

作者：

Liu, Y. ^{[1
]}

Shao, D. F. ^{[1
]}

Li, L. J. ^{[1
]}

Lu, W. J. ^{[1
]}

Zhu, X. D. ^{[2
]}

Tong, P. ^{[1
]}

Xiao, R. C. ^{[1
]}

Ling, L. S. ^{[2
]}

Xi, C. Y. ^{[2
]}

Pi, L. ^{[2
]}

Tian, H. F. ^{[3
]}

Yang, H. X. ^{[3
]}

Li, J. Q. ^{[3
,4
]}

Song, W. H. ^{[1
]}

Zhu, X. B. ^{[1
]}

Sun, Y. P. ^{[1
,2
,5
]}

机构：

[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

[2] Chinese Acad Sci, High Field Magnet Lab, Hefei 230031, Peoples R China

[3] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[4] Collaborat Innovat Ctr Quantum Matter, Beijing 100190, Peoples R China

[5] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 04期

基金：

中国国家自然科学基金;

关键词：

FERMI SURFACES; 1T-TAS2;

D O I：

10.1103/PhysRevB.94.045131

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Transition-metal dichalcogenides (TMDs) MX2 (M = Ti, Nb, Ta; X = S, Se, Te) exhibit a rich set of charge density wave (CDW) orders, which usually coexist and/or compete with superconductivity. The mechanisms of CDWs and superconductivity in TMDs are still under debate. Here we perform an investigation on a typical TMD system, 1T-TaSe2-xTex (0 <= x <= 2). Doping-induced disordered distribution of Se/Te suppresses CDWs in 1T-TaSe2. A domelike superconducting phase with the maximum T-c(onset) of 2.5 K was observed near CDWs. The superconducting volume is very small inside the CDW phase and becomes very large instantly when the CDW phase is fully suppressed. The observations can be understood based on the strong q-dependent electron-phonon coupling-induced periodic-lattice-distortion (PLD) mechanism of CDWs. The volume variation of superconductivity implies the emergence of domain walls in the suppressing process of CDWs. Our concluded scenario makes a fundamental understanding about CDWs and related superconductivity in TMDs.

引用

页数：8

共 47 条

[1] Atomistic origin of an ordered superstructure induced superconductivity in layered chalcogenides [J].

Ang, R. ;

Wang, Z. C. ;

Chen, C. L. ;

Tang, J. ;

Liu, N. ;

Liu, Y. ;

Lu, W. J. ;

Sun, Y. P. ;

Mori, T. ;

Ikuhara, Y. .

NATURE COMMUNICATIONS, 2015, 6

[2] Superconductivity and bandwidth-controlled Mott metal-insulator transition in 1T-TaS2-xSex [J].

Ang, R. ;

Miyata, Y. ;

Ieki, E. ;

Nakayama, K. ;

Sato, T. ;

Liu, Y. ;

Lu, W. J. ;

Sun, Y. P. ;

Takahashi, T. .

PHYSICAL REVIEW B, 2013, 88 (11)

[3] Real-Space Coexistence of the Melted Mott State and Superconductivity in Fe-Substituted 1T-TaS2 [J].

Ang, R. ;

Tanaka, Y. ;

Ieki, E. ;

Nakayama, K. ;

Sato, T. ;

Li, L. J. ;

Lu, W. J. ;

Sun, Y. P. ;

Takahashi, T. .

PHYSICAL REVIEW LETTERS, 2012, 109 (17)

[4] Quantum and classical mode softening near the charge-density-wave-superconductor transition of CuxTiSe2 [J].

Barath, H. ;

Kim, M. ;

Karpus, J. F. ;

Cooper, S. L. ;

Abbamonte, P. ;

Fradkin, E. ;

Morosan, E. ;

Cava, R. J. .

PHYSICAL REVIEW LETTERS, 2008, 100 (10)

[5] Phonons and related crystal properties from density-functional perturbation theory [J].

Baroni, S ;

de Gironcoli, S ;

Dal Corso, A ;

Giannozzi, P .

REVIEWS OF MODERN PHYSICS, 2001, 73 (02) :515-562

[6] Fermi-surface-induced lattice distortion in NbTe2 -: art. no. 195114 [J].

Battaglia, C ;

Cercellier, H ;

Clerc, F ;

Despont, L ;

Garnier, MG ;

Koitzsch, C ;

Aebi, P ;

Berger, H ;

Forró, L ;

Ambrosch-Draxl, C .

PHYSICAL REVIEW B, 2005, 72 (19)

[7] 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)

[8] Charge-Density Wave and Superconducting Dome in TiSe2 from Electron-Phonon Interaction [J].

Calandra, Matteo ;

Mauri, Francesco .

PHYSICAL REVIEW LETTERS, 2011, 106 (19)

[9] FeAs-Based Superconductivity: A Case Study of the Effects of Transition Metal Doping on BaFe2As2 [J].

Canfield, Paul C. ;

Bud'ko, Sergey L. .

ANNUAL REVIEW OF CONDENSED MATTER PHYSICS, VOL 1, 2010, 1 :27-50

[10] SPIN DENSITY WAVE AND SOFT PHONON MODE FROM NESTING FERMI SURFACES [J].

CHAN, SK ;

HEINE, V .

JOURNAL OF PHYSICS F-METAL PHYSICS, 1973, 3 (04) :795-809

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