低温自旋冰的Debye-Hückel理论
Debye-Hückel theory for spin ice at low temperature
摘要：
在低温下，自旋冰是由有限密度的磁链--具有相互磁库仑相互作用的点状拓扑缺陷构成的。我们讨论了德拜休克尔理论的框架下，我们提供了一个详细的上下文特定的帐户所产生的磁性库仑液体的属性。我们讨论了热力学和动力学特征，并将德拜·休克尔理论与实验和数值进行了比较，包括比热和交流磁化率的数据。我们还评估了熵库仑相互作用，这是目前除了磁性之一，并表明，它是在目前的化合物定量不重要。最后，我们解决的作用，绑定bundle anti-bundle对，并推导出一个表达式的bundle流动性。
英文摘要：
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 Hückel theory, for which we provide a detailed context-specific account. We discuss both thermodynamical and dynamical signatures, and compare Debye Hückel theory to experiment as well as numerics, including data for specific heat and AC susceptibility. We also evaluate the entropic Coulomb interaction which 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.
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