Superconducting transition in wire network under spatially modulated magnetic field

被引:1
作者
Sano, Hirotaka [1 ]
Endo, Akira [1 ]
Katsumoto, Shingo [1 ]
Iye, Yasuhiro [1 ]
机构
[1] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan
来源
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2008年 / 468卷 / 7-10期
关键词
superconducting wire network; magnetic field modulation; Little-Parks oscillation; FFXY model;
D O I
10.1016/j.physc.2007.11.058
中图分类号
O59 [应用物理学];
学科分类号
摘要
Superconducting wire network subjected to a uniform and a checkerboard-patterned magnetic field is investigated. The checkerboard field is created by an array of ferromagnetic dots placed on top of the superconducting network. The superconducting transition at alpha = 1/2 (alpha being the frustration parameter) is studied in detail by measuring the current-voltage (I-V) characteristics. The vortex configuration in this case is doubly degenerate. We investigated the change of the transition according to lifting this degeneracy by applying the checkerboard field. The results are consistent with the scenario proposed by Korshnov [S.E. Korshnov, Phys. Rev. Lett. 88 (2002) 167007]. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码:824 / 827
页数:4
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