Ferromagnetic Coulomb phase in classical spin ice

Powell, Stephen (2015) Ferromagnetic Coulomb phase in classical spin ice. Physical Review B, 91 (9). 094431/1-094431/11. ISSN 2469-9969

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Spin ice is a frustrated magnetic system that at low temperatures exhibits a Coulomb phase, a classical spin liquid with topological order and deconfined excitations. This work establishes the presence of a Coulomb phase with coexisting ferromagnetic order in a microscopic model of classical spin ice subject to uniaxial lattice distortion. General theoretical arguments are presented for the presence of such a phase, and its existence is confirmed using Monte Carlo results. This example is used to illustrate generic properties of spin liquids with magnetic order, including deconfinement of monopoles, signatures in the neutron-scattering structure factor, and critical behavior at phase transitions. An analogous phase, a superfluid with spontaneously broken particle–hole symmetry, is demonstrated in a model of hard-core lattice bosons, related to spin ice through the quantum– classical correspondence

Item Type: Article
Additional Information: Ferromagnetic Coulomb phase in classical spin ice Stephen Powell Physical Review B, 91 094431 (2015)
Schools/Departments: University of Nottingham UK Campus > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1103/PhysRevB.91.094431
Depositing User: Powell, Stephen
Date Deposited: 06 Jul 2016 13:41
Last Modified: 22 Sep 2016 09:14
URI: http://eprints.nottingham.ac.uk/id/eprint/34678

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