Quasi Long Range Ordered Ground-State of the Random Field XY Model

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概要

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• We show that in the simple Imry-Ma type argument of random field XY model, additional vortex energy is missing which is crucial to explain the quasi-long-range ordered state experimentally observed in the so-called Bragg glass phase of superconductors. We also show numerical results which indicate that power-law correlated state is easily obtained by simple local relaxation scheme at zero-temperature. The same scheme is also applied to random field O(4) spin model, in which there are no topological defects, and we show that the obtained states have only short-ranged correlation. These results indicate that the topological defects are crucial in determining the low-temperature properties of random field spin models.

• 理論物理学刊行会の論文
• 2005-04-30

著者

• Arakawa Chuichi

  Center For Promotion Of Computational Science And Engineering Japan Atomic Energy Research Institute

• Itakura Mitsuhiro

  Center For Promotion Of Computational Science And Engineering Japan Atomic Energy Research Institute

関連論文

• Quasi Long Range Ordered Ground-State of the Random Field XY Model
• Quasi Long Range Ordered Ground-State of the Random Field XY Model

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