2005/01/26 by T. Kwapinski, T. Kwapiński, R. Taranko +1
Engineering · Physics and Astronomy · #Molecular Junctions and Nanostructures #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.72.125312
34 pages, 12 figures
arxiv created 2005/01/26 · openalex publication_date 2005/09/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have studied the electron transport through a quantum dot coupled to three leads in the presence of external microwave fields supplied to different parts of the considered mesoscopic system. Additionally, we introduced a possible nonresonant tunneling channel between leads. The quantum dot charge and currents were determined in terms of the appropriate evolution operator matrix elements and under the wide-band limit the analytical formulas for time-averaged currents and differential conductance were obtained. We have also examined the response of the considered system on the rectangular-pulse modulation imposed on different quantum dot-lead barriers as well as the time dependence of currents flowing in response to suddenly removed (or included) connection of a quantum dot with one of the leads.