Phase diagram of planar U(l) x U(l) superconductor - Condensation of vortices with fractional flux and a superfluid state

• We discuss a phase diagram of two-dimensional U(1) x U(l) superconductor in the field theoretic formalizm of [Phys. Rev. Lett. 89 (2002) 067001]. In particular we discuss that when penetration length is short the system exhibit a quasi-neutral quasi-superfluid state which is a state when quasi-long range order sets in only in phase difference while individually the phases are disordered.

Nyckelord

yang-mills theory

gross-neveu model

layered superconductors

fluctuations

films

evaporation

temperature

transition

dimensions

monopoles

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