Universal monopole scaling near transitions from the Coulomb phase

Details Universal monopole scaling near transitions from the Coulomb phase Universal monopole scaling near transitions from the Coulomb phase

2012-03-20

arxiv.org/abs/1203.4564v1

Physics

Condensed Matter

Statistical Mechanics

4.5 pages, 4 figures

Scientific paper

Certain frustrated systems, including spin ice and dimer models, exhibit a Coulomb phase at low temperatures, with power-law correlations and fractionalized monopole excitations. Transitions out of this phase, at which the effective gauge theory becomes confining, provide examples of unconventional criticality. This work studies the behavior at nonzero monopole density near such transitions, using scaling theory to arrive at universal expressions for the crossover phenomena. For a particular transition in spin ice, quantitative predictions are made through a duality mapping to the XY model, and confirmed using Monte Carlo simulations.

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