Nernst and Seebeck Coefficients of the Cuprate Superconductor YBa2Cu3O6.67: A Study of Fermi Surface Reconstruction

被引：120

作者：

Chang, J. ^{[1
,2
]}

Daou, R. ^{[1
,2
]}

Proust, Cyril ^{[3
,4
]}

LeBoeuf, David ^{[1
,2
]}

Doiron-Leyraud, Nicolas ^{[1
,2
]}

Laliberte, Francis ^{[1
,2
]}

Pingault, B. ^{[1
,2
]}

Ramshaw, B. J. ^{[5
]}

Liang, Ruixing ^{[4
,5
]}

Bonn, D. A. ^{[4
,5
]}

Hardy, W. N. ^{[4
,5
]}

Takagi, H. ^{[6
]}

Antunes, A. B. ^{[7
]}

Sheikin, I. ^{[7
]}

Behnia, K. ^{[8
]}

Taillefer, Louis ^{[1
,2
,4
]}

机构：

[1] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

[2] Univ Sherbrooke, RQMP, Sherbrooke, PQ J1K 2R1, Canada

[3] CNRS, Lab Natl Champs Magnet Intenses, F-31432 Toulouse, France

[4] Canadian Inst Adv Res, Toronto, ON, Canada

[5] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V5Z 1M9, Canada

[6] Univ Tokyo, Dept Adv Mat, Kashiwa, Chiba 2778561, Japan

[7] CNRS, Lab Natl Champs Magnet Intenses, F-38042 Grenoble, France

[8] UPMC, ESPCI, CNRS, LPEM, F-75231 Paris, France

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 05期

基金：

加拿大自然科学与工程研究理事会;

关键词：

QUANTUM OSCILLATIONS; PSEUDOGAP; ORDER;

D O I：

10.1103/PhysRevLett.104.057005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Seebeck and Nernst coefficients S and v of the cuprate superconductor YBa2Cu3Oy (YBCO) were measured in a single crystal with doping p = 0.12 in magnetic fields up to H = 28 T. Down to T = 9 K, v becomes independent of field by H similar or equal to 30 T, showing that superconducting fluctuations have become negligible. In this field-induced normal state, S/T and v/T are both large and negative in the T -> 0 limit, with the magnitude and sign of S/T consistent with the small electronlike Fermi surface pocket detected previously by quantum oscillations and the Hall effect. The change of sign in S(T) at T similar or equal to 50 K is remarkably similar to that observed in La2-xBaxCuO4, La2-x-yNdySrxCuO4, and La2-x-yEuySrxCuO4, where it is clearly associated with the onset of stripe order. We propose that a similar density-wave mechanism causes the Fermi surface reconstruction in YBCO.

引用

页数：4

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