Memory and Chaos Effects in Spin Glasses
Disordered Systems and Neural Networks
2009-10-31 v2
Abstract
New low frequency ac susceptibility measurements on two different spin glasses show that cooling/heating the sample at a constant rate yields an essentially reversible (but rate dependent) X(T) curve; a downward relaxation of X occurs during a temporary stop at constant temperature (ageing). Two main features of our results are: (i)when cooling is resumed after such a stop, X goes back to the reversible curve (chaos) (ii) upon re-heating, X perfectly traces the previous ageing history (memory). We discuss implications of our results for a real space (as opposed to phase space) picture of spin glasses.
Cite
@article{arxiv.cond-mat/9806134,
title = {Memory and Chaos Effects in Spin Glasses},
author = {K. Jonason and E. Vincent and J. Hammann and J. P. Bouchaud and P. Nordblad},
journal= {arXiv preprint arXiv:cond-mat/9806134},
year = {2009}
}
Comments
4 pages, 3 figures. Minor corrections on Sept. 1, 1998 (original version on June 10)