双峰随机场Ghatak-Sherrington模型的逆跃迁
Inverse Transitions in the Ghatak-Sherrington model with Bimodal Random Fields
摘要：
本文研究了纵向随机场$h_{i}$服从双峰分布的Ghatak-Sherrington（GS）模型.该模型考虑随机键相互作用$J_{i,j}$，其遵循具有平均值$J_0/N$和方差$J^2/N$的高斯分布。这使我们能够引入键无序强度参数$J/J_0$，以探测来自随机键和离散RF的无序在不寻常的相变（称为逆转变（IT））上的组合效应。平均场近似的结果表明，这两种类型的障碍有完全不同的作用的IT。他们指出，键无序创造了必要的条件，存在的逆冻结，甚至逆熔化取决于键无序的强度，而RF往往会强制机制，破坏IT。
英文摘要：
The present work studies the Ghatak-Sherrington (GS) model with the presence of a longitudinal magnetic random field (RF) $h_{i}$ following a bimodal distribution. The model considers a random bond interaction $J_{i,j}$ which follows a Gaussian distribution with mean $J_0/N$ and variance $J^2/N$. This allows us to introduce the bond disorder strength parameter $J/J_0$ to probe the combined effects of disorder coming from the random bond and the discrete RF over unusual phase transitions known as inverse transitions (ITs). The results within a mean field approximation indicate that these two types of disorder have complete distinct roles for the ITs. They indicate that bond disorder creates the necessary conditions for the presence of inverse freezing or even inverse melting depending on the bond disorder strength, while the RF tends to enforce mechanisms that destroy the ITs.
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。
