Splitting the multiphase point

Details Splitting the multiphase point Splitting the multiphase point

1995-06-28

arxiv.org/abs/cond-mat/9506129v1

Physics

Condensed Matter

14 pages, Revtex, 3 Figs. available upon request Oxford University

Scientific paper

Models with competing interactions, for example the ANNNI model, can have special points at which the ground state is infinitely degenerate, so-called multiphase points. Small perturbations can lift this degeneracy and give rise to infinite sequences of long-period phases. This paper compares the effect of three possible perturbations, quantum fluctuations, thermal fluctuations and the softening of the spins from their quantised positions.

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