arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1301.0685cond-mat.stat-mechcond-mat.dis-nn
收藏

定向玻璃:无反射对称性的广义类自旋玻璃模型中的完全复本对称性破缺

Orientational glass: full replica symmetry breaking in generalized spin glass-like models without reflection symmetry

E. E. Tareyeva, T. I. Schelkacheva, N. M. Chtchelkatchev

摘要:

本文研究了在玻璃化转变点附近,用任意对角算符U代替Ising自旋的广义Sherrington-Kirkpatrick模型的自由能的展开.我们重点讨论了当U是一个反射对称破缺的算子时的情形。这样的考虑是很重要的理解行为的自旋玻璃状相在一些真实的物理系统,主要是在取向玻璃的混合分子晶体,目前正是这种情况。当U的非对称部分很小时,我们明确地建立了取向玻璃序参量方程的完全复本对称性破缺(FRSB)解。这个特殊的结果提出了一个反例的背景下,通常采用的猜想,没有反射对称性的系统中没有FRSB解决方案。

英文摘要:

We investigate near the point of glass transition the expansion of the free energy corresponding to the generalized Sherrington--Kirkpatrick model with arbitrary diagonal operators U standing instead of Ising spins. We focus on the case when U is an operator with broken reflection symmetry. Such a consideration is important for understanding the behavior of spin-glass-like phases in a number of real physical systems, mainly in orientational glasses in mixed molecular crystals which present just the case. We build explicitly a full replica symmetry breaking (FRSB) solution of the equations for the orientational glass order parameters when the non-symmetric part of U is small. This particular result presents a counterexample in the context of usually adopted conjecture of the absence of FRSB solution in systems with no reflection symmetry.

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。

↑