Direct evidence for an intrinsic square vortex lattice in the overdoped high-Tc superconductor La1.83Sr0.17CuO4+δ -: art. no. 217003

被引：101

作者：

Gilardi, R ^{[1
]}

Mesot, J

Drew, A

Divakar, U

Lee, SL

Forgan, EM

Zaharko, O

Conder, K

Aswal, VK

Dewhurst, CD

Cubitt, R

Momono, N

Oda, M

机构：

[1] Swiss Fed Inst Technol, Neutron Scattering Lab, CH-5232 Villigen PSI, Switzerland

[2] PSI Villigen, Spallat Neutron Source Div, CH-5232 Villigen PSI, Switzerland

[3] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland

[4] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[5] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

[6] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 0600810, Japan

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.88.217003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report here the first direct observations of a well ordered vortex lattice in the bulk of a La2-xSr xCuO4+delta single crystal (slightly overdoped, x=0.17 ). Our small angle neutron scattering investigation of the mixed phase reveals a crossover from triangular to square coordination with increasing magnetic field. The existence of an intrinsic square vortex lattice has never been observed in high-temperature superconductors and is indicative of the coupling of the vortex lattice to a source of anisotropy, such as those provided by a d -wave order parameter or the presence of stripes.

引用

页数：4

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