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摘要翻译：
分析了在双高斯随机磁场作用下，无限程相互作用Ising铁磁体的相变。这种随机场被定义为两个高斯分布的叠加，呈现相同的宽度$\sigma$。本文认为，这种分布比它的更简单的特殊情况，即双峰($\sigma=0$)和单高斯分布更适合于对实际系统的理论描述。结果表明，随着Δσ值的增加，低温一级相变可能被破坏，类似于化合物$Fe_{x}Mg_{1-x}Cl_{2}$的情况，其有限温度一级相变可能因场随机性的增加而被破坏。
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英文标题：
《Destruction of first-order phase transition in a random-field Ising
model》
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作者：
N. Crokidakis, F. D. Nobre
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最新提交年份：
2007
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分类信息：
一级分类：Physics 物理学
二级分类：Disordered Systems and Neural Networks 无序系统与神经网络
分类描述：Glasses and spin glasses; properties of random, aperiodic and quasiperiodic systems; transport in disordered media; localization; phenomena mediated by defects and disorder; neural networks
眼镜和旋转眼镜；随机、非周期和准周期系统的性质；无序介质中的传输；本地化；由缺陷和无序介导的现象；神经网络
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
The phase transitions that occur in an infinite-range-interaction Ising ferromagnet in the presence of a double-Gaussian random magnetic field are analyzed. Such random fields are defined as a superposition of two Gaussian distributions, presenting the same width $\sigma$. Is is argued that this distribution is more appropriate for a theoretical description of real systems than its simpler particular cases, i.e., the bimodal ($\sigma=0$) and the single Gaussian distributions. It is shown that a low-temperature first-order phase transition may be destructed for increasing values of $\sigma$, similarly to what happens in the compound $Fe_{x}Mg_{1-x}Cl_{2}$, whose finite-temperature first-order phase transition is presumably destructed by an increase in the field randomness.
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PDF链接：
https://arxiv.org/pdf/709.4214
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