Email this article Influence of Coulomb Correlations on Nonequilibrium Quantum Transport in a Quadruple Quantum-Dot Structure
- Authors: Kagan M.Y.1,2, Aksenov S.V.3
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Affiliations:
- Kapitza Institute for Physical Problems
- National Research University Higher School of Economics
- Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch
- Issue: Vol 107, No 8 (2018)
- Pages: 493-499
- Section: Condensed Matter
- URL: https://journals.rcsi.science/0021-3640/article/view/160894
- DOI: https://doi.org/10.1134/S0021364018080027
- ID: 160894
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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 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.
About the authors
M. Yu. Kagan
Kapitza Institute for Physical Problems; National Research University Higher School of Economics
Author for correspondence.
Email: kagan@kapitza.ras.ru
Russian Federation, Moscow, 119334; Moscow, 101000
S. V. Aksenov
Kirensky Institute of Physics, Federal Research Center KSC, Siberian Branch
Email: kagan@kapitza.ras.ru
Russian Federation, Krasnoyarsk, 660036
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