Shearing transition in a superconducting vortex lattice subject to periodic pinning

被引：4
|
作者：
Rosen, Y. J. [1 ,2 ,3 ,4 ]
Guenon, S. [3 ,4 ]
Schuller, Ivan K. [3 ,4 ]
机构：
[1] Lab Phys Sci, College Pk, MD 20740 USA
[2] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[3] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA
[4] Univ Calif San Diego, Ctr Adv Nanosci, La Jolla, CA 92093 USA
来源：
PHYSICAL REVIEW B | 2013年 / 88卷 / 17期
基金：
美国国家科学基金会;
关键词：
STATES; DOTS; FLOW;
D O I：
10.1103/PhysRevB.88.174511
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have studied the shearing forces in a superconducting vortex system with artificial pinning sites using the Corbino geometry. Current was injected into the center of a Nb disc and propagated radially outward to produce a force in the azimuthal direction on the vortices, with strength proportional to 1/r. We investigated the magnetoresistance properties of the vortex lattice as a function of temperature, current, and pinning lattice configuration. The measurements show steps instead of minima at the matching field positions, indicating an unexpected influence of the pinning array on the motion of the vortex lattice. The results imply that these steps are due to a shearing transition of the vortices.
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收藏
页数：5
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