The influence of Coulomb correlations on nonequilibrium quantum transport in quadruple quantum-dot structure

Abstract

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 of 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.

arXiv comment13 pages, 4 figures

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Cited by in corpus (6)

• Collapse of the Fano Resonance Caused by the Nonlocality of the Majorana State
• Level anticrossing effect in single-level or multilevel double quantum dots: Electrical conductance, zero-frequency charge susceptibility and Seebeck coefficient
• Formation of droplets of the order parameter and superconductivity in inhomogeneous Fermi-Bose mixtures (Brief review)
• Local magnetic moments and electronic transport in closed loop quantum dot systems: a case of quadruple quantum dot ring at and away from equilibrium
• Spin-polarized transport in quadruple quantum dots attached to ferromagnetic leads
• Exact diagonalization study of double quantum dots in parallel geometry in zero-bandwidth limit