Open Access Nano Express

Pumped double quantum dot with spin-orbit coupling

Denis Khomitsky1 and Eugene Sherman23*

Author affiliations

1 Department of Physics, University of Nizhny Novgorod, 23 Gagarin Avenue, 603950 Nizhny Novgorod, Russian Federation

2 Department of Physical Chemistry, Universidad del País Vasco, 48080 Bilbao, Spain

3 IKERBASQUE Basque Foundation for Science, 48011, Bilbao, Spain

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Citation and License

Nanoscale Research Letters 2011, 6:212  doi:10.1186/1556-276X-6-212

Published: 11 March 2011

Abstract

We study driven by an external electric field quantum orbital and spin dynamics of electron in a one-dimensional double quantum dot with spin-orbit coupling. Two types of external perturbation are considered: a periodic field at the Zeeman frequency and a single half-period pulse. Spin-orbit coupling leads to a nontrivial evolution in the spin and orbital channels and to a strongly spin- dependent probability density distribution. Both the interdot tunneling and the driven motion contribute into the spin evolution. These results can be important for the design of the spin manipulation schemes in semiconductor nanostructures.

PACS numbers: 73.63.Kv,72.25.Dc,72.25.Pn