Vortex interactions in a thin platelet superconductor

Details Vortex interactions in a thin platelet superconductor Vortex interactions in a thin platelet superconductor

2008-10-03

arxiv.org/abs/0810.0717v1

J Stat Mech (2008) 11004

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1088/1742-5468/2008/11/P11004

The thermal fluctations of vortices in a superconductor can be usefully mapped onto the quantum fluctations of a collection of bosons at T=0 moving in 2 dimensions. When the superconductor is a thin platelet with the magnetic field parallel to its surface, the interacting quantum bosons are effectively moving in 1 dimension, allowing for powerful Luttinger liquid methods to be applied. Here we consider how this 1 dimensional limit is approached, studying the interaction of vortices with the platelet surfaces and each other. Using realistic parameters and vortex interactions for an underdoped YBCO platelet we determine the scattering length, a, characterizing the low energy interaction of a vortex pair as a function of the platelet thickness. a determines the Luttinger parameter, g, for the quantum system at low densities, n_0: g -> 1-2an_0.

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