Photon-assisted transport through ultrasmall quantum dots: Influence of intradot transitions

Brune, P. and Bruder, C. and Schoeller, H.. (1997) Photon-assisted transport through ultrasmall quantum dots: Influence of intradot transitions. Physical Review B, 56 (8). pp. 4730-4736.

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We study transport through one or two ultrasmall quantum dots with discrete energy levels to which a time-dependent field is applied (e.g., microwaves). The ac field causes photon-assisted tunneling and also transitions between discrete energy levels of the dot. We treat the problem by introducing a generalization of the rotating-wave approximation to arbitrarily many levels. We calculate the dc current through one dot and find satisfactory agreement with recent experiments by Oosterkamp et al. [Phys. Rev. Lett. 78, 1536 (1997)]. In addition, we propose an electron pump consisting of two serially coupled single-level quantum dots with a time-dependent interdot barrier.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Bruder, Christoph
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:12 Dec 2016 11:21
Deposited On:12 Dec 2016 11:21

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