Persistent current in a mesoscopic cylinder: effects of radial magnetic field
نویسنده
چکیده
In this work, we study persistent current in a mesoscopic cylinder subjected to both longitudinal and transverse magnetic fluxes. A simple tight-binding model is used to describe the system, where all the calculations are performed exactly within the non-interacting electron picture. The current I is investigated numerically concerning its dependence on total number of electrons Ne, system size N , longitudinal magnetic flux φl and transverse magnetic flux φt. Quite interestingly we observe that typical current amplitude oscillates as a function of the transverse magnetic flux, associated with the energy-flux characteristics, showing Nφ0 flux-quantum periodicity, where N and φ0 (= ch/e) correspond to the system size and the elementary flux-quantum respectively. This analysis may provide a new aspect of persistent current for multi-channel cylindrical systems in the presence of radial magnetic field Br, associated with the flux φt. PACS No.: 73.23.-b; 73.23.Ra; 75.20.-g
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