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arXiv 1809.05488cond-mat.mes-hall
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热量子霍尔效应中整数边和分数边沟道的部分平衡

Partial equilibration of integer and fractional edge channels in the thermal quantum Hall effect

Ken K. W. Ma, D. E. Feldman

摘要:

由于在大的填充因子下,带电模式比量子霍尔边缘上的中性模式快得多,因此在热导实验中边缘可能保持不平衡。这揭示了在$ν=8/3$处观察到的热霍尔电导的不完美量子化,并且可以将在$ν=8/5$处观察到的热导增加两个量子。在某些不太可能但并非不可能的假设下,这也可能使在$ν=5/2$处观察到的热导不仅与PH-Pfronan序一致,而且与反Pfronan序一致。

英文摘要:

Since the charged mode is much faster than the neutral modes on quantum Hall edges at large filling factors, the edge may remain out of equilibrium in thermal conductance experiments. This sheds light on the observed imperfect quantization of the thermal Hall conductance at $ν=8/3$ and can increase the observed thermal conductance by two quanta at $ν=8/5$. Under certain unlikely but not impossible assumptions, this might also reconcile the observed thermal conductance at $ν=5/2$ with not only the PH-Pfaffian order but also the anti-Pfaffian order.

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