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Abstract
In multi-channel tunneling systems quantum interference effects modify tunneling conductance spectra due to Fano effect. We investigated the impact of Hubbard type Coulomb interaction on tunneling conductance spectra for the system formed by several interacting impurity atoms or quantum dots localised between the contact leads. It was shown that the Fano shape of tunneling conductance spectra strongly changes in the presence of on-site Coulomb interaction between localised electrons in the intermediate system. The main effect which determines the shape of the tunneling peaks could be not Fano interference but mostly nonequilibrium dependence of the occupation numbers on bias voltage.
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Details
1 Lomonosov Moscow State University, Quantum Electronics Department, Quantum Technology Center, Faculty of Physics, Moscow, Russia (GRID:grid.14476.30) (ISNI:0000 0001 2342 9668)
2 Lomonosov Moscow State University, Department of Semiconductor Physics and Cryoelectronics, Quantum Technology Center, Faculty of Physics, Moscow, Russia (GRID:grid.14476.30) (ISNI:0000 0001 2342 9668)
3 Lomonosov Moscow State University, Department of Semiconductor Physics and Cryoelectronics, Faculty of Physics, Moscow, Russia (GRID:grid.14476.30) (ISNI:0000 0001 2342 9668)
4 Skolkovo Institute of Science and Technology, Center for Computational and Data-intensive Science and Engineering, Moscow, Russia (GRID:grid.454320.4) (ISNI:0000 0004 0555 3608)
5 P.N. Lebedev Physical Institute of the Russian Academy of Science, Moscow, Russia (GRID:grid.425806.d) (ISNI:0000 0001 0656 6476)
6 Humboldt Universitat zu Berlin, Institut fur Physik, IRIS Adlesdorf, Berlin, Germany (GRID:grid.7468.d) (ISNI:0000 0001 2248 7639)