Generalized Spin-Glass Relaxation
- 4 March 2009
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 102 (9), 097202
- https://doi.org/10.1103/physrevlett.102.097202
Abstract
Spin relaxation close to the glass temperature of and spin glasses is shown, by neutron spin echo, to follow a generalized exponential function which explicitly introduces hierarchically constrained dynamics and macroscopic interactions. The interaction parameter is directly related to the normalized Tsallis nonextensive entropy parameter and exhibits universal scaling with reduced temperature. At the glass temperature corresponding, within Tsallis’ statistics, to a mathematically defined critical value for the onset of strong disorder and nonlinear dynamics.
Keywords
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