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arXiv 0912.3469cond-mat.dis-nn
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三维稀化偶极海森堡模型中自旋温度自旋玻璃相变的证据

Evidence for a Finite-Temperature Spin Glass Transition in a Diluted Dipolar Heisenberg Model in Three Dimensions

Pawel Stasiak, Michel J. P. Gingras

摘要:

通过并行回火蒙特卡罗模拟,我们发现强有力的证据,在一个系统的稀释经典海森堡偶极子随机放置在网站上的一个简单的立方晶格有限温度自旋玻璃化转变。我们进行了有限尺寸标度分析的自旋玻璃磁化率,$χ_{\rm SG}$,和自旋玻璃相关长度,$ξ_{L}$。对于可用的系统大小,可以成功地平衡,交叉的$ξ_{L}/L$与温度的强烈影响的校正缩放和可能的短长度尺度铁磁自旋阻塞。类似于对不同的三维自旋玻璃系统的许多研究,我们没有发现自旋玻璃的序参量Binder比的交叉。

英文摘要:

By means of parallel tempering Monte Carlo simulations we find strong evidence for a finite-temperature spin-glass transition in a system of diluted classical Heisenberg dipoles randomly placed on the sites of a simple cubic lattice. We perform a finite-size scaling analysis of the spin-glass susceptibility, $χ_{\rm SG}$, and spin-glass correlation length, $ξ_{L}$. For the available system sizes that can be successfully equilibrated, the crossing of $ξ_{L}/L$ versus temperature is strongly affected by corrections to scaling and possibly by a short-length scale ferromagnetic spin blocking. Similarly to many studies of different three dimensional spin-glass systems, we do not find a crossing of the spin glass order parameter Binder ratio.

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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