標題: Sliding Abrikosov lattice in a superconductor with a regular array of artificial pinning centers: AC conductivity and criticality at small frequencies
作者: Maniv, T.
Rosenstein, B.
Shapiro, I.
Shapiro, B. Ya.
Hung, R. F.
電子物理學系
Department of Electrophysics
關鍵字: Sliding vortex lattice;Periodic pinning array;Time-dependent Ginzburg-Landau theory
公開日期: 1-十月-2010
摘要: Dynamics of the flux lattice in the mixed state of strongly type-II superconductor near the upper critical field subjected to AC field and interacting with a periodic array of short range pinning centers is considered. The superconductor in a magnetic field in the absence of thermal fluctuations on is described by the time-dependent Ginzburg-Landau equations. For a special case of the delta-function shaped pinning centers and for pinning array commensurate with the Abrikosov lattice (so that vortices outnumber pinning centers) an analytic expression or the AC conductivity is obtained. It is found that below a certain critical pinning strength and for sufficiently low frequencies there exists a sliding Abrikosov lattice, which vibrates nearly uniformly despite interactions with the pinning centers. At very small frequencies the conductivity diverges at the critical pinning strength. (C) 2010 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.physc.2010.02.070
http://hdl.handle.net/11536/6679
ISSN: 0921-4534
DOI: 10.1016/j.physc.2010.02.070
期刊: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume: 470
Issue: 19
起始頁: 744
結束頁: 746
顯示於類別:會議論文


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