2011/04/29 by Hengyi Xu, T. Heinzel, Igor Zozoulenko +1
Materials Science · Physics and Astronomy · #Condensed matter physics #Fano resonance #Graphene research and applications #Physics #Plasmon #Quantum #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum wire #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.84.035319
published as Phys. Rev. B 84, 035319 (2011) in slightly revised form · 5 pages, 5 figures
arxiv created 2011/04/29 · openalex publication_date 2011/07/27 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The transport through a quantum wire exposed to two magnetic spikes in series is modeled. We demonstrate that quantum dots can be formed this way which couple to the leads via magnetic barriers. Conceptually, all quantum dot states are accessible by transport experiments. The simulations show Breit-Wigner resonances in the closed regime, while Fano resonances appear as soon as one open transmission channel is present. The system allows one to tune the dot's confinement potential from subparabolic to superparabolic by experimentally accessible parameters.