Ac response of the flux-line liquid in the high-[ital T][sub [ital c]] superconductors

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.50.6382· OSTI ID:7004956

Chen, L; Marchetti, M C ^[1]

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1. Physics Department, Syracuse University, Syracuse, New York 13244 (United States)

We use a hydrodynamics theory to discuss the response of a viscous flux-line liquid to an ac perturbation applied at the surface of the sample. The theory incorporates viscoelastic effects and describes the crossover between liquidlike and solidlike response of the vortex array as the frequency of the perturbation increases. A large viscosity from flux-line interactions and entanglement leads to viscous screening of surface fields. As a result, two frequency-dependent length scales are needed to describe the penetration of an ac field. For large viscosities the imaginary part of the ac permeability can exhibit, in addition to the well-known peak associated with flux diffusion across the sample, a low-frequency peak corresponding to the transition from solidlike to liquidlike behavior.

• OSTI ID: 7004956
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 50:9; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AC SYSTEMS
ENERGY SYSTEMS
HIGH-TC SUPERCONDUCTORS
HYDRODYNAMIC MODEL
MAGNETIC FLUX
MATHEMATICAL MODELS
PARTICLE MODELS
PERMEABILITY
POWER SYSTEMS
STATISTICAL MODELS
SUPERCONDUCTORS
THERMODYNAMIC MODEL