Journal of Statistical Physics

, Volume 57, Issue 3–4, pp 511–530 | Cite as

Statistical mechanics of flux lines in high-T c superconductors

  • David R. Nelson
Articles

Abstract

A theory of the entangled flux liquids which arise in the new high-T c superconductors is reviewed. New physics appears because of the weak interplanar couplings and high critical temperatures in these materials. Flux line wandering melts the conventional Abrikosov flux lattice, and leads to an entangled vortex state whose statistical mechanics is closely related to the physics of interacting bosons in two dimensions. The phase diagram as a function of magnetic field and temperature is discussed, and it is argued that an entangled vortex liquid appears just aboveHc1 at all nonzero temperatures. The decay of vortex line correlations in the entangled liquid state is controlled by the superfluid excitation spectrum of the bosons. Line wandering produces drastic changes in theB(H) constitutive relation nearHc1.

Key words

Superconductors flux lines bosons 

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Copyright information

© Plenum Publishing Corporation 1989

Authors and Affiliations

  • David R. Nelson
    • 1
  1. 1.Lyman Laboratory of PhysicsHarvard UniversityCambridge

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