Fractional vortices in the XY model with p bonds
نویسندگان
چکیده
We define a new set of excitations in the XY model which we call ‘‘fractional vortices.’’ In the frustrated XY model containing p bonds, we make the ansatz that the ground state configurations can be characterized by pairs of oppositely charged fractional vortices. For a chain of p bonds, the ground state energy and the phase configurations calculated on the basis of this ansatz agree well with the results from direct numerical simulations. Finally, we discuss the possible connection of these results to some recent experiments by Kirtley et al. @Phys. Rev. B 51, R12 057 ~1995!# on high-Tc superconductors where fractional flux trapping was observed along certain grain boundaries.
منابع مشابه
Fractional vortices in the XY - model with π - bonds
We define a new set of excitations in the XY-model which we call " fractional vortices ". In the frustrated XY-model containing π-bonds, we make the ansatz that the ground state configurations can be characterized by pairs of oppositely charged fractional vortices. For a chain of π-bonds, the ground state energy and the phase configurations calculated on the basis of this ansatz agree well with...
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