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Glassy dynamics near zero temperature

Ricci-Tersenghi¹, Zecchina

¹The Abdus Salam International Center for Theoretical Physics, Condensed Matter Group, Strada Costiera 11, P.O. Box 586, I-34100 Trieste, Italy.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

|January 4, 2001

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Structure of Homoleptic Cu(I)(CO)(3) Cations in Cu(I)-Exchanged ZSM-5 Zeolite: An X-ray Absorption Study This project was supported by MURST (Cofin 98, Area 03). XAFS measurements were performed at ESRF (European Synchrotron Radiation Facitity) within the public user program. BM8 GILDA beamline is supported by INFN, INFM and CNR. The European Community is gratefully acknowledged for a TMR grant to G.T.P. We are indebted to F. Danca for skilful technical support and to M. Benfatto for critical discussion.

Angewandte Chemie (International ed. in English)·2000

This study numerically investigates spin glasses, revealing significant time-space heterogeneities and power law distributions in flipping times at low temperatures. These findings suggest spontaneous time scale separation in complex magnetic systems.

Area of Science:

Condensed matter physics
Statistical mechanics

Background:

Spin glasses are complex magnetic systems exhibiting quenched disorder.
Understanding their low-temperature dynamics is crucial for theoretical and experimental physics.

Purpose of the Study:

To numerically investigate the dynamics of finite-dimensional spin glasses at low and zero temperatures.
To identify key characteristics of their behavior, including heterogeneity and time scales.

Main Methods:

Numerical simulations of finite-dimensional spin glass models.
Analysis of dynamics at low and zero temperatures.
Investigation of blocking, clustering, and persistence phenomena using zero-temperature dynamics.

Main Results:

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Evidence for strong time-space heterogeneities in spin glass dynamics.

Observation of spontaneous time scale separation.

Identification of power law distributions for flipping times.

Characterization of blocking, clustering, and persistence phenomena.

Conclusions:

Finite-dimensional spin glasses exhibit complex dynamics characterized by heterogeneity and scale separation.
Zero-temperature dynamics provide insights into blocking, clustering, and persistence.
The findings contribute to the understanding of disordered magnetic systems.