Aharonov-Bohm effect in many-electron quantum rings

Article

关键词: ELECTROMAGNETIC POTENTIALS;    OSCILLATIONS;    CONDUCTANCE;    OCTOPUS;    TOOL;   

DOI  :  10.1103/PhysRevB.81.245316

来源: SCIE

【 摘 要 】

The Aharonov-Bohm effect is investigated in two-dimensional, single-terminal quantum rings in magnetic fields by using time-dependent density-functional theory. We find multiple transport loops leading to the oscillation periods of h/(en), where n is the number of loops. We show that the Aharonov-Bohm oscillations are relatively weakly affected by the electron-electron interactions, whereas the ring width has a strong effect on the characteristics of the oscillations. Our results propose that in those experimental semiconductor quantum-ring devices that show clear Aharonov-Bohm oscillations the electron current is dominated by a few states along narrow conduction channels.

【 授权许可】

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