| Issue |
EPL
Volume 87, Number 4, August 2009
|
|
|---|---|---|
| Article Number | 47002 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
| DOI | https://doi.org/10.1209/0295-5075/87/47002 | |
| Published online | 31 August 2009 | |
Violation of Onsager symmetry for a ballistic channel Coulomb coupled to a quantum ring
1
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: bszafran@agh.edu.pl
Received:
18
May
2009
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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