Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-08-05
Phil.Mag. 86 (2006) 2033
Physics
High Energy Physics
High Energy Physics - Theory
12 pages, no figures, to be published in Philos. Mag
Scientific paper
10.1080/14786430500080049
New qualitative picture of vortex length-scale dependence has been found in recent electrical transport measurements performed on strongly anisotropic BSCCO single crystals in zero magnetic field. This indicates the need for a better description of the 3D/2D crossover in vortex dimensionality. The vortex-dominated properties of high transition temperature superconductors with extremely high anisotropy (layered systems) are reasonably well described in the framework of the layered XY model which can be mapped onto the layered sine-Gordon model. For the latter we derive an exact renormalization group (RG) equation using Wegner's and Houghton's approach in the local potential approximation. The agreement of the UV scaling laws find by us by linearizing the RG equations with those obtained previously in the literature in the dilute gas approximation makes the improvement appearant which can be achieved by solving our RG equations numerically.
Nandori I.
Sailer K.
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