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      https://www.ias.ac.in/article/fulltext/pram/066/01/0055-0065

    • Keywords

       

      Superconductivity; flux-line liquids; quenched disorder; point defects; rela-tivistic bosons

    • Abstract

       

      We consider the effect of weak uncorrelated quenched disorder (point defects) on a strongly fluctuating flux-line liquid. We use a hydrodynamic model which is based on mapping the flux-line system onto a quantum liquid ofrelativistic charged bosons in 2 + 1 dimensions [P Benetatos and M C Marchetti,Phys. Rev.B64, 054518 (2001)]. In this model, flux lines are allowed to be arbitrarily curved and can even form closed loops. Point defects can be scalar or polar. In the latter case, the direction of their dipole moments can be random or correlated. Within the Gaussian approximation of our hydrodynamic model, we calculate disorder-induced corrections to the correlation functions of the flux-line fields and the elastic moduli of the flux-line liquid. We find that scalar disorder enhances loop nucleation, and polar (magnetic) defects decrease the tilt modulus.

    • Author Affiliations

       

      Panayotis Benetatos1 M Cristina Marchetti2

      1. Hahn-Meitner-Institut, Abteilung Theoretische Physik (SF5), Glienicker Str. 100, Berlin - D-14109, Germany
      2. Physics Department, Syracuse University, NY, Syracuse - 13244, USA
    • Dates

       
  • Pramana – Journal of Physics | News

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