Applicability of layered sine-Gordon models to layered superconductors: II. the case of magnetic coupling

I. Nándori, K. Vad, S. Mészáros, U. Jentschura, S. Nagy, K. Sailer

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In this paper, we propose a quantum field theoretical renormalization group approach to the vortex dynamics of magnetically coupled layered superconductors, to supplement our earlier investigations on the Josephson-coupled case. We construct a two-dimensional multi-layer sine-Gordon type model which we map onto a gas of topological excitations. With a special choice of the mass matrix for our field theoretical model, vortex dominated properties of magnetically coupled layered superconductors can be described. The well known interaction potentials of fractional flux vortices are consistently obtained from our field theoretical analysis, and the physical parameters (vortex fugacity and temperature parameter) are also identified. We analyse the phase structure of the multi-layer sine-Gordon model by a differential renormalization group method for the magnetically coupled case from first principles. The dependence of the transition temperature on the number of layers is found to be in agreement with known results based on other methods.

Original languageEnglish
Article number496211
JournalJournal of Physics Condensed Matter
Volume19
Issue number49
DOIs
Publication statusPublished - Dec 12 2007

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Magnetic couplings
Superconducting materials
Vortex flow
vortices
renormalization group methods
supplements
Phase structure
Superconducting transition temperature
Gases
transition temperature
Fluxes
matrices
gases
excitation
interactions
Temperature
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Applicability of layered sine-Gordon models to layered superconductors : II. the case of magnetic coupling. / Nándori, I.; Vad, K.; Mészáros, S.; Jentschura, U.; Nagy, S.; Sailer, K.

In: Journal of Physics Condensed Matter, Vol. 19, No. 49, 496211, 12.12.2007.

Research output: Contribution to journalArticle

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