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arXiv 1012.4251cond-mat.stat-mech
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海森堡全阻挫简单立方晶格的相变

Phase Transition in Heisenberg Fully Frustrated Simple Cubic Lattice

V. Thanh Ngo, D. Tien Hoang, Hung The Diep

摘要:

阻挫自旋系统中的相变是统计物理中一个令人感兴趣的课题。本文给出了在海森堡自旋模型下,对完全阻挫简单立方晶格中的相变进行Wang-Landau平坦直方图蒙特卡罗模拟的结果。该系统的基态简并度是无穷大的,具有两个连续的参数。我们发现一个明确的一阶过渡矛盾与以前的研究表明,具有不寻常的临界特性的二阶过渡。我们计算的稳健性使我们能够得出结论,结束了长达20年的不确定性。

英文摘要:

The phase transition in frustrated spin systems is a fascinated subject in statistical physics. We show the result obtained by the Wang-Landau flat histogram Monte Carlo simulation on the phase transition in the fully frustrated simple cubic lattice with the Heisenberg spin model. The degeneracy of the ground state of this system is infinite with two continuous parameters. We find a clear first-order transition in contradiction with previous studies which have shown a second-order transition with unusual critical properties. The robustness of our calculations allows us to conclude this issue putting an end to the 20-year long uncertainty.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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