Length-scale dependence of vortex dynamics in HTSC superconductors

I. Nándori, K. Vad

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Abstract

The length-scale dependence and critical behaviour of vortex dynamics in high transition temperature superconductors (HTSC) are studied by means of renormalization group and by electrical transport methods. We present some current transport measurements on Bi2Sr2CaCu 2O8 single crystals which indicate the need for a better description of the length-scale dependence of the vortex response in layered systems. Due to the weak coupling between the superconducting copper oxide layers and extremely high anisotropy of HTSC materials, the layered XY model is one of the most accepted model which describes the vortex-dominated properties of layered superconductors. The layered XY model can be mapped into the layered sine-Gordon model. We perform a renormalization group analysis of the layered sine-Gordon model and show that the model exhibits a Kosterlitz-Thouless type phase-transition.

Original languageEnglish
Pages (from-to)1161-1164
Number of pages4
JournalJournal of Optoelectronics and Advanced Materials
Volume8
Issue number3
Publication statusPublished - Jun 1 2006

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Keywords

  • High temperature superconductivity
  • Renormalization group
  • Sine-Gordon model
  • Vortex dynamics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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