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arXiv 2004.04161cond-mat.str-elhep-th
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在$ν=5/2$上反Pfronan边缘模的部分平衡

Partial equilibration of anti-Pfaffian edge modes at $ν=5/2$

Hamed Asasi, Michael Mulligan

摘要:

最近测量了分数量子霍尔态在填充分数$ν=5/2$处的热霍尔电导$K$为$K=2.5 π^2k_B^2T/3h$ [M. Banerjee等人,Nature ${\bf 559}$,205(2018)]。该结果的半整数值(以$π^2k_B^2T/3h$为单位)提供了强有力的证据,证明存在马约拉纳边缘模式和对应的量子霍尔态,其中包含具有非阿贝尔统计的准粒子。这一测量是否指向实现PH-Pfalan或反Pfalan国家一直是争论的主题。在这里,我们认为这种测量的影响,反Pfiran边缘状态运输。我们表明,在一个强的库仑相互作用和近似的自旋简并在最低的朗道水平的限制,反Pfiran状态承认低温边缘相与霍尔电导测量是一致的。这些边缘相可以在一定温度范围内表现出完全平衡的电传输与部分平衡的热传输共存。通过研究的动力学方程描述低温电和热传输的这些边缘状态,我们确定制度的参数空间,控制不同的边缘模式之间的相互作用,符合实验。

英文摘要:

The thermal Hall conductance $K$ of the fractional quantum Hall state at filling fraction $ν=5/2$ has recently been measured to be $K=2.5 π^2k_B^2T/3h$ [M. Banerjee et al., Nature ${\bf 559}$, 205 (2018)]. The half-integer value of this result (in units of $π^2k_B^2T/3h$) provides strong evidence for the presence of a Majorana edge mode and a corresponding quantum Hall state hosting quasiparticles with non-Abelian statistics. Whether this measurement points to the realization of the PH-Pfaffian or the anti-Pfaffian state has been the subject of debate. Here we consider the implications of this measurement for anti-Pfaffian edge-state transport. We show that in the limit of a strong Coulomb interaction and an approximate spin degeneracy in the lowest Landau level, the anti-Pfaffian state admits low-temperature edge phases that are consistent with the Hall conductance measurements. These edge phases can exhibit fully-equilibrated electrical transport coexisting with partially-equilibrated heat transport over a range of temperatures. Through a study of the kinetic equations describing low-temperature electrical and heat transport of these edge states, we determine regimes of parameter space, controlling the interactions between the different edge modes, that agree with experiment.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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