Self-excited oscillations of charge-spin accumulation due to single-electron tunneling
Artikel i vetenskaplig tidskrift, 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

Författare

Danko Radic

Chalmers, Teknisk fysik, Kondenserade materiens teori

Göteborgs universitet

Anatoli M. Kadigrobov

Göteborgs universitet

Leonid Gorelik

Chalmers, Teknisk fysik, Kondenserade materiens teori

Robert I. Shekhter

Göteborgs universitet

Mats Jonson

Göteborgs universitet

Physical Review B - Condensed Matter and Materials Physics

1098-0121 (ISSN)

Vol. 82 125311 (7 pages)-

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.82.125311