Planar Superconductivity via Kosterlitz-Thouless mechanism

Details Planar Superconductivity via Kosterlitz-Thouless mechanism Planar Superconductivity via Kosterlitz-Thouless mechanism

1995-12-11

arxiv.org/abs/hep-th/9512072v1

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, Revtex

Scientific paper

The phase structure of a $(2+1)$ - dimensional model of relativistic fermions with a four fermi interaction is analyzed in the strong coupling regime using the large $N$ perturbation theory. It is shown that, this model exhibits a low temperature superconducting phase due to the vortex-anti vortex binding via Kosterlitz-Thouless mechanism. Above a critical temperature, vortices unbind and superconductivity is destroyed; at a still higher temperature the vacuum expectation value of a neutral order parameter vanishes. The ground state respects parity and time reversal symmetries.

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