Fermi-edge singularity and related interaction induced phenomena in multilevel quantum dots

Article

关键词: ONE-DIMENSIONAL SYSTEMS;    HALL-EFFECT REGIME;    LUTTINGER-LIQUID;    MAGNETIC-FIELD;    METALS;   

DOI  :  10.1103/PhysRevB.95.155419

来源: SCIE

【 摘 要 】

We study the manifestation of the nonperturbative effects of interaction in sequential tunneling between a quasi-one-dimensional system of chiral quantum Hall edge channels and a multilevel quantum dot (QD). We use the formal scattering theory approach to the bosonization technique to present an alternative derivation of the Fermi-edge singularity effect and demonstrate the origin of its universality. This approach allows us to address, within the same framework, plasmon-assisted sequential tunneling to relatively large dots and investigate the interaction-induced level broadening. The results are generalized by taking into account the dispersion in the spectrum of plasmons in the QD. We then discuss their modification in the presence of neutral modes, which can be realized either in a QD with two chiral strongly interacting edge channels or in a three-dimensional QD in the Coulomb blockade regime. In the former case a universal behavior of the tunneling rate is discovered.

【 授权许可】

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