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Paper detail

Incommensurate vortices and phase transitions in two-dimensional XY models with interaction having auxiliary minima

We discuss if phase diagrams of the two-dimensional XY models in which the interaction of nearest planar spins is a nonmonotonic function of the angle u between them, V(u) = - Jcos(u) - Kcos(qu) can include a phase transition related to the dissociation of pairs of fractional vortices when q > 2.

preprint2012arXivOpen access
S. E. Korshunov
cond-mat.stat-mech
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S. E. Korshunov

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