Triangular superconducting array with a quarter of the flux quantum per plaquette.

作者: Seunghwan Kim , Sooyeul Lee , MY Choi , None

DOI: 10.1103/PHYSREVB.46.1240

关键词: Phase transitionSuperconductivityHexagonal latticeMonte Carlo methodMagnetic fluxTransition temperatureMagnetic flux quantumMean field theoryCondensed matter physicsPhysics

摘要: We investigate the phase transition in a triangular superconducting array with quarter of flux quantum per plaquette. The system has infinitely-degenerate ground states addition to those associated U(1) symmetry. study both mean-field limit, where it is equivalent tight-binding electron, and via Monte Carlo method. It found that exhibits single nature which vortex-antivortex unbinding. existence peculiar domain-wall-type excitations, induce unbinding thus lower temperature, also pointed out

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