Nanoscopic rings pierced by external magnetic fields and asymmetrically connected to wires behave in sharp contrast with classical expectations. By studying the real-time evolution of tight-binding models in different geometries, we show that the creation of a magnetic dipole by a bias-induced current is a process that can be reversed: connected rings excited by an internal ac flux produce ballistic currents in the external wires. In particular we point out that, by employing suitable flux protocols, single-parameter nonadiabatic pumping can be achieved, and an arbitrary amount of charge can be transferred from one side to the other. We also propose a set up that could serve a memory device, in which both the operations of {\it writing} and {\it erasing} can be efficiently performed.
Cini, M., & Perfetto, E. (2011). Magnetically induced pumping and memory storage in quantum rings. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 84, 2452011-2452015.
Tipologia: | Articolo su rivista | |
Citazione: | Cini, M., & Perfetto, E. (2011). Magnetically induced pumping and memory storage in quantum rings. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 84, 2452011-2452015. | |
IF: | Con Impact Factor ISI | |
Lingua: | English | |
Settore Scientifico Disciplinare: | Settore FIS/03 - Fisica della Materia | |
Revisione (peer review): | Esperti anonimi | |
Tipo: | Articolo | |
Rilevanza: | Rilevanza internazionale | |
Stato di pubblicazione: | Pubblicato | |
Data di pubblicazione: | 2011 | |
Titolo: | Magnetically induced pumping and memory storage in quantum rings | |
Autori: | ||
Autori: | Cini, M; Perfetto, E | |
Appare nelle tipologie: | 01 - Articolo su rivista |
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