Magneto-Optical Measurements of a Cascade of Transitions in Superconducting La1. 875Ba0.125CuO4 Single Crystals

被引：43

作者：

Karapetyan, Hovnatan ^{[1
,2
]}

Huecker, M. ^{[3
]}

Gu, G. D. ^{[3
]}

Tranquada, J. M. ^{[3
]}

Fejer, M. M. ^{[2
]}

Xia, Jing ^{[4
]}

Kapitulnik, A. ^{[1
,2
,5
]}

机构：

[1] Stanford Inst Mat & Energy Sci, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[2] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[3] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[5] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 109卷 / 14期

关键词：

COPPER-OXIDE METALS; MAGNETIC ORDER; CUPRATE SUPERCONDUCTORS; STRUCTURAL TRANSITION; PHASE-TRANSITIONS; LA2-XBAXCUO4; STRIPES; LA2-XSRXCUO4; PSEUDOGAP; ANOMALIES;

D O I：

10.1103/PhysRevLett.109.147001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent experiments on the original cuprate high-temperature superconductor, La2-xBaxCuO4, revealed a remarkable sequence of phase transitions. Here we investigate such crystals with the polar Kerr effect, which is sensitive to time-reversal-symmetry breaking. Concurrent birefringence measurements accurately locate the structural phase transitions from high-temperature tetragonal to low-temperature orthorhombic, and then to lower-temperature tetragonal, at which temperature strong Kerr signal onsets. Hysteretic behavior of the Kerr signal suggests that time-reversal symmetry is already broken well above room temperature, an effect that was previously observed in high quality YBa2Cu3O6+x crystals.

引用

页数：5

共 44 条

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