JETP Letters

, Volume 107, Issue 8, pp 493–499 | Cite as

Influence of Coulomb Correlations on Nonequilibrium Quantum Transport in a Quadruple Quantum-Dot Structure

  • M. Yu. Kagan
  • S. V. Aksenov
Condensed Matter


The description of quantum transport in a quadruple quantum-dot structure (QQD) is proposed taking into account the Coulomb correlations and nonzero bias voltages. To achieve this goal the combination of nonequilibrium Green’s functions and equation-of-motion technique is used. It is shown that the anisotropy of kinetic processes in the QQD leads to negative differential conductance (NDC). The reason for the effect is an interplay of the Fano resonances, which are induced by the interdot Coulomb correlations. Different ways to increase the peak-to-valley ratio related to the observed NDC are discussed.


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© Pleiades Publishing, Inc. 2018

Authors and Affiliations

  1. 1.Kapitza Institute for Physical ProblemsRussian Academy of SciencesMoscowRussia
  2. 2.National Research University Higher School of EconomicsMoscowRussia
  3. 3.Kirensky Institute of Physics, Federal Research Center KSC, Siberian BranchRussian Academy of SciencesKrasnoyarskRussia

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