Instituto de Ciencia de Materiales de Madrid
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Edge-state blockade of transport in quantum dot arrays

Mónica Benito, Michael Niklas, Gloria Platero, and Sigmund Kohler
Phys. Rev. B 93, 115432 (2016)

We propose a transport blockade mechanism in quantum dot arrays and conducting molecules based on an interplay of Coulomb repulsion and the formation of edge states.As a modelwe employ a dimer chain that exhibits a topological phase transition. The connection to a strongly biased electron source and drain enables transport. We show that the related emergence of edge states is manifest in the shot noise properties as it is accompanied by a crossover from bunched electron transport to a Poissonian process. For both regions we develop a scenario that can be captured by a rate equation. The resulting analytical expressions for the Fano factor agree well with the numerical solution of a full quantum master equation.
arXiv:1511.01348 [cond-mat]

[ICMM-CSIC] [Condensed Matter Theory]
last modified: 7.11.2017 by Sigmund Kohler