Zooming on the quantum critical point in Nd-LSCO

被引：12

作者：

Cyr-Choiniere, Olivier ^{[1
,2
]}

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

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

Laliberte, Francis ^{[1
,2
]}

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

LeBoeuf, David ^{[1
,2
]}

Jo, Y. J. ^{[3
]}

Balicas, L. ^{[3
]}

Yan, J-Q. ^{[4
]}

Cheng, J. -G. ^{[5
]}

Zhou, J. -S. ^{[5
]}

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

Taillefer, Louis ^{[1
,2
,6
]}

机构：

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

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

[3] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[4] US DOE, Ames Lab, Ames, IA 50011 USA

[5] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

[6] Canadian Inst Adv Res, Toronto, ON M5G 1Z8, Canada

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷

关键词：

Nd-LSCO; Quantum critical point; Superconductivity; c-Axis electrical resistivity; La-based cuprates; T-C SUPERCONDUCTOR; FERMI-SURFACE; OSCILLATIONS; ORDER;

D O I：

10.1016/j.physc.2009.11.073

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Recent studies of the high-T(c) superconductor La(1.6-x)Nd(0.4)Sr(x)CuO(4) (Nd-LSCO) have found a linear-T inplane resistivity rho(ab) and a logarithmic temperature dependence of the thermopower S/T at a hole doping p = 0.24 and a Fermi-surface reconstruction just below p = 0.24 [1,2]. These are typical signatures of a quantum critical point (QCP). Here we report data on the c-axis resistivity rho(c)(T) of Nd-LSCO measured as a function of temperature near this QCP, in a magnetic field large enough to entirely suppress superconductivity. Like rho(ab), rho(c) shows an upturn at low temperature, a signature of Fermi surface reconstruction caused by stripe order. Tracking the height of the upturn as it decreases with doping enables us to pin down the precise location of the QCP where stripe order ends, at p* = 0.235 +/- 0.005. We propose that the temperature T(p) below which the upturn begins marks the onset of the pseudogap phase, found to be roughly twice as high as the stripe-ordering temperature in this material. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：S12 / S13

页数：2

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