How the next-nearest-neighbor interactions change the phase diagram of a fully frustrated XY model?

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Abstract

We introduce a fully frustrated XY model with nearest-neighbor (nn) and next-nearest-neighbor (nnn) couplings which can be realized in Josephson junction arrays. We study by means of Monte Carlo simulations the phase diagram for 0⩽x⩽1 (x is the ratio between nnn and nn couplings).

Keywords

Josephson junction arrays
Phase transitions

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