Self-excited oscillations of charge-spin accumulation due to single-electron tunneling
Journal article, 2010

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 1 GHz for realistic values of the junction parameters.

magnetoresistance

magnetic-field

single-electron tunneling

quantum dots

junctions

coulomb-blockade

transport

Author

Danko Radic

Chalmers, Applied Physics, Condensed Matter Theory

University of Gothenburg

Anatoli M. Kadigrobov

University of Gothenburg

Leonid Gorelik

Chalmers, Applied Physics, Condensed Matter Theory

Robert I. Shekhter

University of Gothenburg

Mats Jonson

University of Gothenburg

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 82 12 125311 (7 pages)-

Subject Categories

Condensed Matter Physics

DOI

10.1103/PhysRevB.82.125311

More information

Created

10/7/2017