Vertex dynamics in finite two-dimensional square spin ices

Budrikis, Z., Politi, P. and Stamps, R. (2010) Vertex dynamics in finite two-dimensional square spin ices. Physical Review Letters, 105(1), 017201. (doi:10.1103/PhysRevLett.105.017201)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevLett.105.017201

Abstract

Local magnetic ordering in artificial spin ices is discussed from the point of view of how geometrical frustration controls dynamics and the approach to steady state. We discuss the possibility of using a particle picture based on vertex configurations to interpret the time evolution of magnetic configurations. Analysis of possible vertex processes allows us to anticipate different behaviors for open and closed edges and the existence of different field regimes. Numerical simulations confirm these results and also demonstrate the importance of correlations and long-range interactions in understanding particle population evolution. We also show that a mean-field model of vertex dynamics gives important insights into finite size effects.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Stamps, Professor Robert
Authors: Budrikis, Z., Politi, P., and Stamps, R.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review Letters
Publisher:American Physical Society
ISSN:0031-9007
ISSN (Online):1079-7114

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