Conductance oscillations in mesoscopic rings: microscopic versus macroscopic picture

Details Conductance oscillations in mesoscopic rings: microscopic versus macroscopic picture Conductance oscillations in mesoscopic rings: microscopic versus macroscopic picture

2000-04-17

arxiv.org/abs/cond-mat/0004283v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevB.64.085404

The phase of Aharonov-Bohm oscillations in mesoscopic metal rings in the presence of a magnetic field can be modulated by application of a DC-bias current I_DC. We address the question of how a variation of I_DC and hence of the microscopic phases of the electronic wave functions results in the macroscopic phase of the conductance oscillations. Whereas the first one can be varied continuously the latter has to be quantized for a ring in two-wire configuration by virtue of the Onsager symmetry relations. We observe a correlation between a phase flip by +/- pi and the amplitude of the oscillations.

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