环路电流相位的唯象理论
A Phenomenological Theory of Loop-Current Phases
摘要：
提出了一个关于环电流和环自旋电流相的唯象理论。为了研究这些阶段的稳定性，一个Ginzburg-Landau-Wilson型作用量被构造为轨道磁化的功能。基于Landau理论和动量壳层单圈重整化群理论对这种作用进行了分析，发现如果轨道磁化强度之间存在足够大的相互作用，则环电流和环自旋电流相是稳定的。此外，这些相位在具有大轨道磁化率的系统中可能是稳定的，例如狄拉克电子系统。
英文摘要：
A phenomenological theory of the loop-current and loop-spin-current phases is proposed. In order to investigate the stability of these phases, a Ginzburg-Landau-Wilson type action is constructed as a functional of the orbital magnetization. From the analysis of this action based on the Landau theory and momentum-shell one-loop renormalization group theory, it is found that the loop-current and loop-spin-current phases are stable if a certain interaction between the orbital magnetizations is sufficiently large. Moreover, these phases are likely to be stable in systems with large orbital susceptibility, for example, Dirac electron systems.
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