Critical properties of the N-color London model

The critical properties of the N-color London model are studied in d=2+1 dimensions. The model is dualized to a theory of N vortex fields interacting through a Coulomb and a screened potential. The model with N=2 shows two anomalies in the specific heat. From the critical exponents alpha and nu, the...

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Bibliographic Details
Published in:Physical review letters 2004-08, Vol.93 (7), p.077002.1-077002.4, Article 077002
Main Authors: SMISETH, J, SMØRGRAV, E, SUDBØ, A
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic properties
Phenomenological theories (two-fluid, ginzburg-landau, etc.)
Physics
Properties of type I and type II superconductors
Superconductivity
Theory and models of superconducting state
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Summary:The critical properties of the N-color London model are studied in d=2+1 dimensions. The model is dualized to a theory of N vortex fields interacting through a Coulomb and a screened potential. The model with N=2 shows two anomalies in the specific heat. From the critical exponents alpha and nu, the mass of the gauge field, and the vortex correlation functions, we conclude that one anomaly corresponds to an inverted 3Dxy fixed point, while the other corresponds to a 3Dxy fixed point. There are N fixed points, namely, one corresponding to an inverted 3Dxy fixed point, and N-1 corresponding to neutral 3Dxy fixed points. This represents a novel type of quantum fluid, where superfluid modes arise out of charged condensates.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.93.077002