中国物理B ›› 2011, Vol. 20 ›› Issue (4): 47501-047501.doi: 10.1088/1674-1056/20/4/047501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Nonequilibrium dynamics in two-dimensional Ising spin glass

张开成1, 朱岩2   

  1. (1)Department of Physics, Bohai University, Jinzhou 121013, Liaoning Province, China; (2)Department of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • 收稿日期:2010-07-29 修回日期:2010-10-24 出版日期:2011-04-15 发布日期:2011-04-15

Nonequilibrium dynamics in two-dimensional Ising spin glass

Zhang Kai-Cheng(张开成)a) and Zhu Yan(朱岩)b)   

  1. a Department of Physics, Bohai University, Jinzhou 121013, Liaoning Province, China; b Department of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2010-07-29 Revised:2010-10-24 Online:2011-04-15 Published:2011-04-15

摘要: This paper investigates the nonequilibrium dynamics of two-dimensional Ising spin glass by dynamical Monte Carlo simulations. A new method is developed to quantitatively measure the age of domain growth. Using this method it investigates how temperature shift affects the effective age of domain growth. It finds that the T-shift dependence of the effective age follows the prediction of the droplet model quite well. It also investigates the overlap length between the spin glass states as well as the correlated flips of spins, which are not consistent with the theoretical predictions. The possible reasons are discussed.

Abstract: This paper investigates the nonequilibrium dynamics of two-dimensional Ising spin glass by dynamical Monte Carlo simulations. A new method is developed to quantitatively measure the age of domain growth. Using this method it investigates how temperature shift affects the effective age of domain growth. It finds that the T-shift dependence of the effective age follows the prediction of the droplet model quite well. It also investigates the overlap length between the spin glass states as well as the correlated flips of spins, which are not consistent with the theoretical predictions. The possible reasons are discussed.

Key words: nonequilibrium, effective age, site-overlap, droplet model

中图分类号:  (Classical spin models)

  • 75.10.Hk
75.90.+w (Other topics in magnetic properties and materials)