Sliding Abrikosov lattice in a superconductor with a regular array of artificial pinning centers: AC conductivity and criticality at small frequencies

T. Maniv, Baruch Rosenstein, I. Shapiro, B. Ya Shapiro, R. F. Hung

Research output: Contribution to journalArticlepeer-review

Abstract

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 δ-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.

Original languageEnglish
Pages (from-to)744-746
Number of pages3
JournalPhysica C: Superconductivity and its applications
Volume470
Issue number19
DOIs
StatePublished - 1 Oct 2010

Keywords

  • Periodic pinning array
  • Sliding vortex lattice
  • Time-dependent Ginzburg-Landau theory

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