Quantum transport through two series Aharonov--Bohm interferometers with zero total magnetic flux |
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| Authors: | Wang Jian-Ming Wang Rui Zhang Yong-Ping and Liang Jiu-Qing |
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| Affiliation: | Department of Physics and Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, China |
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| Abstract: | With the help of nonequilibrium Green's function technique, the
electronic transport through series Aharonov--Bohm (AB)
interferometers is investigated. We obtain the AB interference
pattern of the transition probability characterized by the algebraic
sum \phi and the difference \theta of two magnetic fluxes, and
particularly a general rule of AB oscillation period depending on the
ratio of integer quantum numbers of the fluxes. A parity effect is
observed, showing the asymmetric AB oscillations with respect to the
even and odd quantum numbers of the total flux in antiparallel AB
interferometers. It is also shown that the AB flux can shift the Fano
resonance peaks of the transmission spectrum. |
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| Keywords: | Aharonov--Bohm interferometer difference of magnetic fluxes Fano effect |
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