作者: Seunghwan Kim , Sooyeul Lee , MY Choi , None
关键词: Phase transition 、 Superconductivity 、 Hexagonal lattice 、 Monte Carlo method 、 Magnetic flux 、 Transition temperature 、 Magnetic flux quantum 、 Mean field theory 、 Condensed matter physics 、 Physics
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