摘要翻译：
我们给出了一个有效的S=1/2方法来描述S>=1中随机场产生的有效性的分析和数值证据，特别是在S=1中，具有强单轴伊辛各向异性和横向弱外磁场Bx的偶极自旋玻璃模型。在对一个微观的S=1玩具模型的有效低能描述中，Bx依赖的随机场自然出现。我们讨论了在横向场作用下LiHo$_x$Y$_1-x}$F$_4$磁性材料中具有Ho$^3+}$Ising矩的Bx诱导随机场的最新理论研究结果。我们证明了S_{eff}=1/2方法在小Bx下能同时捕捉物理的定性和定量方面，给出了与传统的二阶微扰理论相一致的结果。
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英文标题：
《Effective Spin-1/2 Description of Transverse-Field-Induced Random Fields
  in Dipolar Spin Glasses with Strong Single-Ion Anisotropy》
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作者：
S. M. A. Tabei, F. Vernay and M. J. P. Gingras
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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：
  We present analytical and numerical evidence for the validity of an effective S=1/2 approach to the description of random field generation in S>=1, and especially in an S=1, dipolar spin glass models with strong uniaxial Ising anisotropy and subject to weak external magnetic field Bx transverse to the Ising direction. Explicitely Bx-dependent random fields are shown to naturally emerge in the effective low-energy description of a microscopic S=1 toy model. We discuss our results in relation to recent theoretical studies pertaining to the topic of Bx-induced random fields in the LiHo$_x$Y$_{1-x}$F$_4$ magnetic materials with the Ho$^{3+}$ Ising moments subject to a transverse field. We show that the S_{eff}=1/2 approach is able to capture both the qualitative and quantitative aspects of the physics at small Bx, giving results that agree with those obtained using conventional second order perturbation theory.
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PDF链接：
https://arxiv.org/pdf/708.2286