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

Danko Radic (Institutionen för fysik (GU) ; Institutionen för teknisk fysik, Kondenserade materiens teori) ; Anatoli M. Kadigrobov ; Leonid Y. Gorelik (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Robert I. Shekhter ; Mats Jonson
Physical Review B (1098-0121). Vol. 82 (2010), 12, p. 125311 (7 pages).
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: single-electron tunneling, quantum dots, coulomb-blockade, magnetic-field, junctions, magnetoresistance, transport

Denna post skapades 2010-09-13. Senast ändrad 2012-01-03.
CPL Pubid: 126145


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Institutionen för fysik (GU) (GU)
Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)


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Chalmers infrastruktur