Volume 74, Number 4, May 2006
|Page(s)||699 - 705|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||05 April 2006|
Numerical studies of the compressible Ising spin glass
The James Franck Institute and Department of Physics, University of Chicago Chicago, IL 60637, USA
2 The Martin Fisher School of Physics, Brandeis University Waltham, MA 02454, USA
Accepted: 12 March 2006
We study a two-dimensional compressible Ising spin glass at constant volume. The spin interactions are coupled to the distance between neighboring particles in the Edwards-Anderson model with interactions. We find that the energy of a given spin configuration is shifted from its incompressible value, E0, by an amount quadratic in E0 and proportional to the coupling strength. We then construct a simple model expressed only in terms of spin variables that predicts the existence of a critical value of the coupling above which the spin-glass transition cannot exist.
PACS: 75.10.Nr – Spin-glass and other random models / 75.40.Mg – Numerical simulation studies / 05.50.+q – Lattice theory and statistics (Ising, Potts, etc.)
© EDP Sciences, 2006
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