Magnetoresistance oscillations in superconducting strips: A Ginzburg-Landau study

被引：40
作者：
Berdiyorov, G. R. [1 ]
Chao, X. H. [2 ,3 ]
Peeters, F. M. [1 ]
Wang, H. B. [4 ]
Moshchalkov, V. V. [5 ]
Zhu, B. Y. [2 ,3 ]
机构：
[1] Univ Antwerp, Dept Fys, B-2020 Antwerp, Belgium
[2] Chinese Acad Sci, Inst Phys, Natl Lab Superconduct, Beijing 100190, Peoples R China
[3] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[4] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[5] Katholieke Univ Leuven, INPAC Inst Nanoscale Phys & Chem, B-3001 Louvain, Belgium
来源：
PHYSICAL REVIEW B | 2012年 / 86卷 / 22期
基金：
中国国家自然科学基金;
关键词：
MESOSCOPIC AL STRUCTURES; II SUPERCONDUCTORS; VORTEX DYNAMICS; QUANTIZED VORTICES; THIN-FILM; TRANSITION; SIMULATION; WIRES; STATE; FLUCTUATIONS;
D O I：
10.1103/PhysRevB.86.224504
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Within the time-dependent Ginzburg-Landau theory we study the dynamic properties of current-carrying superconducting strips in the presence of a perpendicular magnetic field. We found pronounced voltage peaks as a function of the magnetic field, the amplitude of which depends both on sample dimensions and external parameters. These voltage oscillations are a consequence of moving vortices, which undergo alternating static and dynamic phases. At higher fields or for high currents, the continuous motion of vortices is responsible for the monotonic background on which the resistance oscillations due to the entry of additional vortices are superimposed. Mechanisms for such vortex-assisted resistance oscillations are discussed. Qualitative changes in the magnetoresistance curves are observed in the presence of random defects, which affect the dynamics of vortices in the system.
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