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arXiv 0906.2791cond-mat.mes-hallcond-mat.str-el
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SU(N)Kondo区的非平衡输运理论

Theory of non-equilibrium transport in the SU(N) Kondo regime

Christophe Mora, Pavel Vitushinsky, Xavier Leyronas, Aashish A. Clerk, Karyn Le Hur

摘要:

使用费米液体的方法,我们提供了一个全面的治疗的电流和电流噪声通过量子点,其低能量的行为对应于SU($N$)近藤模型,专注于情况下N=4相关的碳纳米管点。我们表明,对于一般的$N$,需要考虑高阶费米液体校正的影响,甚至描述低电压电流和噪声。我们还表明,噪声表现出复杂的行为,由于相干散粒噪声之间的相互作用,和相互作用引起的散射事件所产生的噪声。我们对待各种不完善的实验,如不对称的点-引线耦合的影响。

英文摘要:

Using a Fermi liquid approach, we provide a comprehensive treatment of the current and current noise through a quantum dot whose low-energy behaviour corresponds to an SU($N$) Kondo model, focusing on the case N=4 relevant to carbon nanotube dots. We show that for general $N$, one needs to consider the effects of higher-order Fermi liquid corrections even to describe low-voltage current and noise. We also show that the noise exhibits complex behaviour due to the interplay between coherent shot noise, and noise arising from interaction-induced scattering events. We treat various imperfections relevant to experiments, such as the effects of asymmetric dot-lead couplings.

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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