Self-excited oscillations of charge-spin accumulation due to single-electron tunneling

Radić, Danko and Kadigrobov, Anatoli and Gorelik, Leonid and Shekhter, Robert and Jonson, Mats (2010) Self-excited oscillations of charge-spin accumulation due to single-electron tunneling. Physical Review B, 82 (12). pp. 125311-7. ISSN 1098-0121

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We theoretically study electronic transport through a layer of quantum dots connecting two metallic leads. By the inclusion of an inductor in series with the junction, we show that steady electronic transport in such a system may be unstable with respect to temporal oscillations caused by an interplay between the Coulomb blockade of tunneling and spin accumulation in the dots. When this instability occurs, a new stable regime is reached, where the average spin and charge in the dots oscillate periodically in time. The frequency of these oscillations is typically on the order of 1GHz for realistic values of the junction parameters.

Item Type: Article
Keywords: quantum dot, Zeeman splitting, Coulomb blockade, spin blockade, spin-dependent transport, spin accumulation, spin filtering, negative differential conductance, charge-spin instability, self-excited oscillations, layered magnetic materials
Date: September 2010
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2010) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191458-1023
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 03 Jun 2014 11:57
Last Modified: 24 Feb 2016 15:29

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