Physics – Condensed Matter – Superconductivity
Scientific paper
2003-09-25
Physics Letters A 337 (2005) 75-80
Physics
Condensed Matter
Superconductivity
10 pages, improved content, submitted for publication to Phys. Lett. A
Scientific paper
10.1016/j.physleta.2005.01.047
Equations built on fractional derivatives prove to be a powerful tool in the description of complex systems when the effects of singularity, fractal supports, and long-range dependence play a role. In this paper, we advocate an application of the fractional derivative formalism to a fairly general class of critical phenomena when the organization of the system near the phase transition point is influenced by a competing nonlocal ordering. Fractional modifications of the free energy functional at criticality and of the widely known Ginzburg-Landau equation central to the classical Landau theory of second-type phase transitions are discussed in some detail. An implication of the fractional Ginzburg-Landau equation is a renormalization of the transition temperature owing to the nonlocality present.
Milovanov Alexander V.
Rasmussen Jens J.
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