Charge Transfer Induced Persistent Current and Capacitance Oscillations

Details Charge Transfer Induced Persistent Current and Capacitance Oscillations Charge Transfer Induced Persistent Current and Capacitance Oscillations

1995-09-18

arxiv.org/abs/cond-mat/9509106v1

Phys. Rev. Lett. 76, 495 (1996)

Physics

Condensed Matter

4 pages, REVTEX 3.0, 2 postscript figures

Scientific paper

10.1103/PhysRevLett.76.495

The transfer of charge between different regions of a phase-coherent mesoscopic sample is investigated. Charge transfer from a side branch quantum dot into a ring changes the persistent current through a sequence of plateaus of diamagnetic and paramagnetic states. In contrast, a quantum dot embedded in a ring exhibits sharp resonances in the persistent current, whose sign is independent of the number of electrons in the dot if the total number of electrons in the system is even. It is shown that such a mesoscopic system can be polarized appreciably not only by the application of an external voltage, but also via an Aharonov-Bohm flux.

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