Debye-Hueckel theory for spin ice at low temperature

C. Castelnovo; R. Moessner; S. L. Sondhi

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Debye-Hueckel theory for spin ice at low temperature

机译：Debye-Huckel低温旋转冰理论

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At low temperatures, spin ice is populated by a finite density of magnetic monopoles-pointlike topological defects with a mutual magnetic Coulomb interaction. We discuss the properties of the resulting magnetic Coulomb liquid in the framework of Debye-Hiickel theory, for which we provide a detailed context-specific account. We discuss both thermodynamical and dynamical signatures and compare Debye-Hiickel theory to experiment as well as numerics, including data for specific heat and AC susceptibility. We also evaluate the entropic Coulomb interaction that is present in addition to the magnetic one and show that it is quantitatively unimportant in the current compounds. Finally, we address the role of bound monopole anti-monopole pairs and derive an expression for the monopole mobility.

机译：在低温下，自旋冰充满了具有相互磁性库仑相互作用的有限密度的磁性单极点状拓扑缺陷。我们在Debye-Hiickel理论的框架内讨论所得磁性库仑液体的性质，为此我们提供了特定于上下文的详细说明。我们讨论了热力学和动力学特征，并比较了Debye-Hiickel理论进行实验和数值计算，包括比热和AC磁化率的数据。我们还评估了除磁性相互作用外还存在的熵库仑相互作用，并表明它在当前化合物中在数量上不重要。最后，我们解决了结合的单极反单极对的作用，并得出了单极迁移率的表达式。

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来源
《Physical review》 |2011年第14期|p.144435.1-144435.14|共14页
作者
C. Castelnovo; R. Moessner; S. L. Sondhi;
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作者单位

Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford 0X1 3NP, United Kingdom,SEPnet and Hubbard Theory Consortium, Department of Physics, Royal Holloway University of London, Egham TW20 OEX, United Kingdom;

Max-Planck-Institut fuer Physik komplexer Systeme, D-01187 Dresden, Germany;

Department of Physics, Princeton University, Princeton, New Jersey 08544, USA;

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正文语种 eng
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关键词
intrinsic properties of magnetically ordered materials; magnetic liquids; magnetic monopoles;

机译：磁性有序材料的固有特性;磁性液体磁单极子;

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Debye-Hueckel theory for spin ice at low temperature

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