Giant persistent currents in the open Aharonov-Bohni rings

Yi, J.; Wei, J. H.; Hong, J. B.; Lee, S. I.

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Giant persistent currents in the open Aharonov-Bohni rings

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Yi, J.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Citation

Yi, J., Wei, J. H., Hong, J. B., & Lee, S. I. (2002). Giant persistent currents in the open Aharonov-Bohni rings. Physical Review B, 650(3): 033305. Retrieved from http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRBMDO000065000003033305000001&idtype=cvips&gifs=yes.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002B-383A-5

Abstract

We investigate persistent currents in the Aharonov-Bohm rings coupled to external leads. For a contacted double-ring structure, it is found that the flux-independent perfect transmission occurs at kl = pi/2, where k is the wave number and l the half length of a single ring. The flux-independent perfect reflection occurs at kl = 0. These repeat with period pi in kl. There are singular points in the flux at f = 1/2 for the flux-independent perfect transmission where f means the ratio of a flux to the flux quantum and at f = 0 for the reflection, These repeat with period 1 in f. A giant persistent current is generated whenever kl approaches these singular points.