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Effective Temperature in an Interacting Vertex System: Theory and Experiment on Artificial Spin Ice
 

Summary: Effective Temperature in an Interacting Vertex System:
Theory and Experiment on Artificial Spin Ice
Cristiano Nisoli,1
Jie Li,2
Xianglin Ke,2
D. Garand,2
Peter Schiffer,2
and Vincent H. Crespi2
1
Theoretical Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
2
Department of Physics and Materials Research Institute, 104 Davey Lab, Pennsylvania State University,
University Park, Pennsylvania 16802, USA
(Received 16 December 2009; published 23 July 2010)
Frustrated arrays of interacting single-domain nanomagnets provide important model systems for
statistical mechanics, as they map closely onto well-studied vertex models and are amenable to direct
imaging and custom engineering. Although these systems are manifestly athermal, we demonstrate that an
effective temperature, controlled by an external magnetic drive, describes their microstates and therefore
their full statistical properties.
DOI: 10.1103/PhysRevLett.105.047205 PACS numbers: 75.50.Lk, 75.10.Jm, 75.25.Āj, 75.75.Āc

  

Source: Andrews, Anne M. - Huck Institutes of the Life Sciences, Pennsylvania State University
Los Alamos National Laboratory, Theoretical Division, Space Simulator

 

Collections: Biology and Medicine; Computer Technologies and Information Sciences; Physics