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

Autori
Radić, Danko ; Kadigrobov, Anatoli ; Gorelik, Leonid ; Shekhter, Robert ; Jonson, Mats

Izvornik
Physical Review B - Condensed Matter and Materials Physics (1098-0121) 82 (2010), 12; 125311-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
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

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA