2008/04/02 by Michael Moskalets, M. Moskalets, Μ. Büttiker +1
Physics and Astronomy · #Quantum and electron transport phenomena #Quantum optics and atomic interactions #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.78.035301
published as Phys. Rev. B 78, 035301 (2008) · 12.5 pages, 5 figures
arxiv created 2008/04/02 · openalex publication_date 2008/07/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We calculate analytically the Floquet scattering matrix for a periodically driven double barrier structure. Our approach takes into account dynamical effects which become necessarily important when electrons propagate through a system subject to a fast drive. It is convenient to represent the Floquet scattering amplitude as the sum of amplitudes corresponding to different times spent by an electron inside the structure. These amplitudes define dynamical scattering channels. Then we represent the dc current generated by the structure as the sum of two generic contributions. The first one is due to photon-assisted interference processes within the same channel and the second one is due to interchannel interference processes. At zero temperature both contributions are present, while at high temperatures and/or high driving frequencies only the former survives.