Vortex lock-in transition and evidence for transitions among commensurate kinked vortex configurations in single-layered Fe arsenides

被引：3

作者：

Li, G. ^{[1
]}

Grissonnanche, G. ^{[1
]}

Conner, B. S. ^{[1
]}

Wolff-Fabris, F. ^{[2
]}

Putzke, C. ^{[2
]}

Zhigadlo, N. D. ^{[3
]}

Katrych, S. ^{[3
,4
]}

Bukowski, Z. ^{[3
]}

Karpinski, J. ^{[3
,4
]}

Balicas, L. ^{[1
]}

机构：

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

[2] Helmholtz Zentrum Dresden Rossendorf, Dresden High Magnet Field Lab, D-01314 Dresden, Germany

[3] Swiss Fed Inst Technol, Lab Solid State Phys, CH-8093 Zurich, Switzerland

[4] Ecole Polytech Fed Lausanne, Inst Condensed Matter Phys, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 10期

关键词：

43; K; SUPERCONDUCTORS; CRYSTALS; VORTICES; TORQUE;

D O I：

10.1103/PhysRevB.87.100503

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report an angle-dependent study of the magnetic torque tau (theta) within the vortex state of single-crystalline LaO0.9F0.1FeAs and SmO0.9F0.1FeAs as a function of both temperature T and magnetic field H. Sharp peaks are observed at a critical angle theta(c) at either side of theta = 90 degrees, where theta is the angle between H and the interplanar c axis. theta(c) is interpreted as the critical depinning angle where the vortex lattice, pinned and locked by the intrinsic planar structure, unlocks and acquires a component perpendicular to the planes. We observe a series of smaller replica peaks as a function of theta and as theta is swept away from the planar direction. These suggest commensurability effects between the period of the vortex lattice and the interplanar distance leading to additional kinked vortex configurations. DOI: 10.1103/PhysRevB.87.100503

引用

页数：4