Vortex Origin of Tricritical Point in Ginzburg-Landau Theory

Details Vortex Origin of Tricritical Point in Ginzburg-Landau Theory Vortex Origin of Tricritical Point in Ginzburg-Landau Theory

2005-09-16

arxiv.org/abs/cond-mat/0509430v1

Physics

Condensed Matter

Superconductivity

4 pages,1 figure

Scientific paper

10.1209/epl/i2006-10029-5

Motivated by recent experimental progress in the critical regime of high-$T_c$ superconductors we show how the tricritical point in a superconductor can be derived from the Ginzburg-Landau theory as a consequence of vortex fluctuations. Our derivation explains why usual renormalization group arguments always produce a first-order transition, in contrast to experimental evidence and Monte Carlo simulations.

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