TY - JOUR

T1 - Sliding Abrikosov lattice in a superconductor with a regular array of artificial pinning centers

T2 - AC conductivity and criticality at small frequencies

AU - Maniv, T.

AU - Rosenstein, Baruch

AU - Shapiro, I.

AU - Shapiro, B. Ya

AU - Hung, R. F.

PY - 2010/10/1

Y1 - 2010/10/1

N2 - 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.

AB - 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.

KW - Periodic pinning array

KW - Sliding vortex lattice

KW - Time-dependent Ginzburg-Landau theory

UR - http://www.scopus.com/inward/record.url?scp=77956177764&partnerID=8YFLogxK

U2 - 10.1016/j.physc.2010.02.070

DO - 10.1016/j.physc.2010.02.070

M3 - Article

AN - SCOPUS:77956177764

VL - 470

SP - 744

EP - 746

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 19

ER -