Generalization of the Berezinskii-Kosterlitz-Thouless theory to higher vortex densities

Details Generalization of the Berezinskii-Kosterlitz-Thouless theory to higher vortex densities Generalization of the Berezinskii-Kosterlitz-Thouless theory to higher vortex densities

1996-02-23

arxiv.org/abs/cond-mat/9602124v1

Physica C 265, 31 (1996)

Physics

Condensed Matter

14 pages, LaTeX, 3 Postscript figures (to appear in Physica C)

Scientific paper

10.1016/0921-4534(96)00177-3

The Berezinskii-Kosterlitz-Thouless theory for superfluid films is generalized in a straightforward way that (a) corrects for overlapping vortex-antivortex pairs at high pair density and (b) utilizes a dielectric approximation for the polarization of the vortex system and a local field correction. Generalized Kosterlitz equations are derived, containing higher order terms, which are compared with earlier predictions. These terms cause the total pair density to remain finite for temperatures above the transition so that it is not necessary to introduce an ad hoc cut-off, as opposed to the original Berezinskii-Kosterlitz-Thouless theory. The low-temperature bound pair phase is destabilized for small vortex core energy. The behaviour of the stiffness constant and of the correlation length close to the transition is not affected by the higher order terms. A first-order transition as suggested by other authors is not found for any values of the parameters. The pair density is calculated for temperatures below and above the transition. Possible experiments and the applicability of the extended approach are discussed. The approach is found to be applicable even in a significant temperature range above the transition.

Affiliated with

Also associated with

No associations

Rating

Generalization of the Berezinskii-Kosterlitz-Thouless theory to higher vortex densities does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Generalization of the Berezinskii-Kosterlitz-Thouless theory to higher vortex densities, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Generalization of the Berezinskii-Kosterlitz-Thouless theory to higher vortex densities will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-557496