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The fully frustrated XY model with next nearest neighbor interaction by Franzese, G.; Cataudella, V.; Korshunov, S. E.; Fazio, R. is a scholarly article available to read on EtoBox.

What is The fully frustrated XY model with next nearest neighbor interaction about?

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 the phase diagram for $0\leq x \leq 1$ ($x$ is the ratio between nnn and nn couplings). When $x < 1/\sqrt{2}$ an Ising and a Berezinskii-Kosterlitz-Thouless transitions are present. Both critical temperatures decrease with increasing $x$. For $x > 1/\sqrt{2}$ the array undergoes a sequence of two transitions. On raising the temperature first the two sublattices decouple from each other and then, at higher temperatures, each sublattice becomes disorderd.

Author

Franzese, G.; Cataudella, V.; Korshunov, S. E.; Fazio, R.

Published

2000

Language

EN