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Condensed Matter > Strongly Correlated Electrons

Title:Emergent Coulombic criticality and Kibble-Zurek scaling in a topological magnet

Abstract: When a classical system is driven through a continuous phase transition, its nonequilibrium response is universal and exhibits Kibble-Zurek scaling. We explore this dynamical scaling in the novel context of a three-dimensional topological magnet with fractionalized excitations, namely the liquid-gas transition of the emergent mobile magnetic monopoles in dipolar spin ice. Using field-mixing and finite-size scaling techniques, we place the critical point of the liquid-gas line in the three-dimensional Ising universality class. We then demonstrate Kibble-Zurek scaling for sweeps of the magnetic field through the critical point. Unusually slow microscopic time scales in spin ice offer a unique opportunity to detect this universal nonequilibrium physics in current experimental setups.
Subjects: Strongly Correlated Electrons (cond-mat.str-el); Statistical Mechanics (cond-mat.stat-mech)
Journal reference: Phys. Rev. B 92, 075142 (2015)
DOI: 10.1103/PhysRevB.92.075142
Cite as: arXiv:1506.03472 [cond-mat.str-el]
  (or arXiv:1506.03472v2 [cond-mat.str-el] for this version)

Submission history

From: James Hamp [view email]
[v1] Wed, 10 Jun 2015 20:39:24 UTC (213 KB)
[v2] Wed, 2 Sep 2015 17:57:28 UTC (1,874 KB)