Scaling approach to pinning : charge-density waves and giant flux creep in superconductors

A general scaling approach to pinning and response in weakly disordered systems is developed that considers pinning at arbitrary high energy barriers. These are a consequence of a disordered {ital T}=0 renormalization-group fixed point which characterizes the condensed phase. Application to flux cre...

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Bibliographic Details
Published in:Physical review letters 1990-05, Vol.64 (20), p.2454-2457
Main Author: NATTERMANN, T
Format: Article
Language:English
Subjects:
656100 - Condensed Matter Physics- Superconductivity
ABSOLUTE ZERO TEMPERATURE
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
CRITICAL TEMPERATURE
CRYSTALS
Exact sciences and technology
MAGNETIC FLUX
PHYSICAL PROPERTIES
Physics
PLASMA WAVES
Properties of type I and type II superconductors
RANDOMNESS
ROUGHNESS
SCALING LAWS
Superconductivity
SUPERCONDUCTORS
SURFACE PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
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Summary:A general scaling approach to pinning and response in weakly disordered systems is developed that considers pinning at arbitrary high energy barriers. These are a consequence of a disordered {ital T}=0 renormalization-group fixed point which characterizes the condensed phase. Application to flux creep in superconductors yields a creep velocity {nu}({ital j}){proportional to}exp{minus}{ital Cj}{sup {minus}{mu}} where {mu} is related to the roughness exponents {zeta} of the flux-line lattice. We argue that {zeta}=0(log) and {mu}=({ital d}{minus}2)/2 as for charge-density waves.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.64.2454