Vortex Origin of Tricritical Point in Ginzburg-Landau Theory

Abstract

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.

4 pages,1 figure

References in corpus (3)

• Vortex Interactions and Thermally Induced Crossover from Type-I to Type-II Superconductivity
• Charged fixed point in the Ginzburg-Landau superconductor and the role of the Ginzburg parameter $\kappa$
• Evidence for charged critical behavior in the pyrochlore superconductor RbOs2O6

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