Volume 87, Number 4, August 2009
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||31 August 2009|
Violation of Onsager symmetry for a ballistic channel Coulomb coupled to a quantum ring
Faculty of Physics and Applied Computer Science, AGH University of Science and Technology al. Mickiewicza 30, 30-059 Kraków, Poland, EU
2 Departement Fysica, Universiteit Antwerpen - Groenenborgerlaan 171, B-2020 Antwerpen, Belgium, EU
Corresponding author: email@example.com
Accepted: 29 July 2009
We investigate a scattering of electron which is injected individually into an empty ballistic channel containing a cavity that is Coulomb coupled to a quantum ring charged with a single electron. We solve the time-dependent Schrödinger equation for the electron pair with an exact account for the electron-electron correlation. Absorption of energy and angular momentum by the quantum ring is not an even function of the external magnetic field. As a consequence we find that the electron backscattering probability is asymmetric in the magnetic field and thus violates Onsager symmetry.
PACS: 73.63.-b – Electronic transport in nanoscale materials and structures / 73.63.Nm – Quantum wires / 73.63.Kv – Quantum dots
© EPLA, 2009
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