Aharonov-Bohm oscillations in disordered nanorings with quantum dots: Effect of electron-electron interactions

Abstract

We investigate the effect of electron-electron interactions on Aharonov-Bohm (AB) current oscillations in nanorings formed by a chain of metallic quantum dots. We demonstrate that electron-electron interactions cause electron dephasing thereby suppressing the amplitude of AB oscillations at all temperatures down to T=0. The crossover between thermal and quantum dephasing is found to be controlled by the ring perimeter. Our predictions can be directly tested in future experiments.

9 pages, 4 figures. To be published in the Proceedings of FQMT08 Conference (Prague 2008), Physica E

References in corpus (4)

• Dephasing due to electron-electron interaction in a diffusive ring
• Quantum decoherence of interacting electrons in arrays of quantum dots and diffusive conductors
• Weak localization in a system with a barrier: Dephasing and weak Coulomb blockade
• Aharonov-Bohm oscillations in coupled quantum dots: Effect of electron-electron interactions

Cited by in corpus (1)

• Weak localization, Aharonov-Bohm oscillations and decoherence in arrays of quantum dots