Unified theory of effects of vortex pinning and flux creep upon the rf surface impedance of type-II superconductors

We present a new theoretical approach that permits the rf surface impedance {ital Z}{sub {ital s}} of type-II superconductors to be calculated over a wide range of angular frequencies {omega}, magnetic inductions {ital B}, and temperatures {ital T}. Our approach, based on a self-consistent treatment...

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Bibliographic Details
Published in:Physical review letters 1991-07, Vol.67 (3), p.386-389
Main Authors: COFFEY, M. W, CLEM, J. R
Format: Article
Language:English
Subjects:
656100 - Condensed Matter Physics- Superconductivity
BROWNIAN MOVEMENT
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
ELECTRIC IMPEDANCE
ELECTROMAGNETIC RADIATION
Exact sciences and technology
IMPEDANCE
MAGNETIC FLUX
MICROWAVE RADIATION
PENETRATION DEPTH
Physics
Properties of type I and type II superconductors
RADIATIONS
Superconductivity
SUPERCONDUCTORS
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TYPE-II SUPERCONDUCTORS
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Summary:We present a new theoretical approach that permits the rf surface impedance {ital Z}{sub {ital s}} of type-II superconductors to be calculated over a wide range of angular frequencies {omega}, magnetic inductions {ital B}, and temperatures {ital T}. Our approach, based on a self-consistent treatment of vortex dynamics, includes the influence of both vortex pinning and flux creep upon {ital Z}{sub {ital s}} in a unified manner, by making use of continued-fraction-expansion results for the dynamic mobility of a particle undergoing Brownian motion in a periodic potential.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.67.386