Uniaxial linear resistivity of superconducting La_(1.905)Ba_(0.095)CuO

Uniaxial linear resistivity of superconducting La_(1.905)Ba_(0.095)CuO_4 induced by an external magnetic field

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Amer Physical Soc

外文摘要：We present an experimental study of the anisotropic resistivity of superconducting La_(2_x)Ba_xCuO_4 with x = 0.095 and transition temperature Tc = 32 K. In a magnetic field perpendicular to the CuO_2 layers H_⊥, we observe that the resistivity perpendicular to the layers ρ_⊥ becomes finite at a temperature consistent with previous studies on very similar materials; however, the onset of finite parallel resistivity ρ‖ occurs at a much higher temperature. This behavior contradicts conventional theory, which predicts that ρ_⊥ and ρ‖ should become finite at the same temperature. Voltage versus current measurements near the threshold of voltage detectability indicate linear behavior perpendicular to the layers, becoming nonlinear at higher currents, while the behavior is nonlinear from the onset parallel to the layers. These results, in the presence of moderate H_⊥, appear consistent with superconducting order parallel to the layers with voltage fluctuations between the layers due to thermal noise. In search of uncommon effects that might help to explain this behavior, we have performed diffraction measurements that provide evidence for H_⊥ -induced charge- and spin-stripe order. The field-induced decoupling of superconducting layers is similar to the decoupled phase observed previously in La_(2_x)Ba_xCuO_4 with x = 1/8 in zero field.

外文关键词：

mixed states, critical fields, and surface sheaths

作者：

Jinsheng Wen、Qing Jie、Qiang Li、M. Hiicker、M. v. Zimmermann、Su Jung Han、Zhijun Xu、D. K. Singh、R. M. Konik、Liyuan Zhang、Genda Gu、J. M. Tranquada

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作者单位：

Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA,Department of Materials Science and Engineering, Stony Brook University, Stony Brook, New York 11794, USA

Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA

Hamburger Synchrotronstrahlungslabor (HASYLAB) at Deutsches Elektronensynchrotron (DESY), 22603 Hamburg, Germany

Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA,Physics Department, The City College of New York, New York, New York 10031, USA

Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA,NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA

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出版年：

2012

DOI：

10.1103/PhysRevB.85.134513

Physical review, B. Condensed matter and materials physics

ISSN：1098-0121

年,卷(期)：2012.85(13)

被引量23
参考文献量58