Joe, Yong S and Kim, Jiseok and Satanin, Arkady M (2006) Resonance characteristics through double quantum dots embedded in series in an Aharonov-Bohm ring. Journal of Physics D: Applied Physics, 39 (9). pp. 1766-1772.
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Official URL: http://stacks.iop.org/0022-3727/39/1766
Abstract
Stimulated by recent intriguing experiments with a quantum dot in an Aharonov-Bohm (AB) ring, we investigate novel resonant phenomena by studying the total transmission probability of nanoscale AB rings with embedded double quantum dots in one arm and a magnetic flux passing through its centre. In this system, we show the overlapping and merging of both Breit-Wiger (BW) and Fano resonances as the interaction parameter between the dots changes. In the strong overlapping regime of Fano resonances, the transmission zeros leave the real-energy axis and move away in opposite directions in the complex-energy plane. The simultaneous swings (from Fano to BW and then back to Fano resonance) of a pair of Fano resonances in the overlapping regime are observed by modulating the magnetic flux threading the AB ring. The periodic tuning of the Fano resonance for a fixed interaction parameter is also discussed as the magnetic flux increases.
| Item Type: | Article |
|---|---|
| ID Code: | 5406 |
| Deposited By: | Prof. Alexey Ivanov |
| Deposited On: | 06 Feb 2010 11:11 |
| Last Modified: | 06 Feb 2010 11:53 |
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