摘要翻译:
半掺杂锰氧化物中电导的场诱导开关是由亚稳性、非均匀高场态和阳离子无序共同控制的。我们在一个适用于锰氧化物的无序强耦合模型上,用实空间蒙特卡罗方法研究了这个非平衡问题。我们再现了开关场随平均离子半径r_A和阳离子无序度Sigma_a的变化,并证明了Landau自由能景观中几个相的接近是如何引起实验特征的。我们对现场熔化状态的预测与越来越多的实验证据是一致的。
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英文标题:
《Conductance Switching and Inhomogeneous Field Melting in the Charge
Ordered Manganites》
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作者:
Anamitra Mukherjee, Kalpataru Pradhan and Pinaki Majumdar
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最新提交年份:
2009
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分类信息:
一级分类:Physics 物理学
二级分类:Strongly Correlated Electrons 强关联电子
分类描述:Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学,非费米液体,自旋液体,量子临界性,电荷密度波,金属-绝缘体跃迁
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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 field induced switching of conductance in the charge ordered half-doped manganites is controlled by the combination of metastability, an inhomogeneous high field state, and cation disorder. We study this non-equilibrium problem via real space Monte Carlo on a disordered strong coupling model appropriate to the manganites. We reproduce the variation of the switching fields with the mean ionic radius r_A and cation disorder \sigma_A, and demonstrate how the experimental features arise from the proximity of several phases in the Landau free energy landscape. Our prediction for the field melted state is consistent with a growing body of experimental evidence.
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PDF链接:
https://arxiv.org/pdf/801.2054