| Original Articles |
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Fano Interference versus Kondo Effect in Strongly Correlated T-Shaped Quantum Dots Embedded in an Aharonov--Bohm Ring |
| CHEN Bao-Ju 1,2;CHEN Xiong-Wen 1,2;SHI Zhen-Gang 1,2;ZHU Xi-Xiang 1,2;SONG Ke-Hui 1,2;WU Shao-Quan 3 |
| 1Department of Physics and Electronic Information Science, Huaihua University, Huaihua 4180082Research Institute of Information Science, Huaihua University, Huaihua 4180083Department of Physics, Sichuan Normal University, Chengdu 610068 |
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| Cite this article: |
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CHEN Bao-Ju, CHEN Xiong-Wen, SHI Zhen-Gang et al 2007 Chin. Phys. Lett. 24 1046-1049 |
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Abstract We theoretically investigate the properties of the ground state of the
strongly correlated T-shaped double quantum dots embedded in an
Aharonov--Bohm ring in the Kondo regime by means of the one-impurity
Anderson Hamiltonian. It is found that in this system, the persistent
current depends sensitively on the parity and size of the ring. With the
increase of interdot coupling, the persistent current is suppressed due
to the enhancing Fano interference weakening the Kondo effect. Moreover,
when the spin of quantum dot embedded in the Aharonov--Bohm ring is
screened, the persistent current peak is not affected by interdot
coupling. Thus this model may be a new candidate for detecting Kondo
screening cloud.
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| Keywords:
72.10.Fk
72.15.Qm
73.23.Ra
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Received: 18 September 2006
Published: 26 March 2007
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| PACS: |
72.10.Fk
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(Scattering by point defects, dislocations, surfaces, and other imperfections (including Kondo effect))
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72.15.Qm
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(Scattering mechanisms and Kondo effect)
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73.23.Ra
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(Persistent currents)
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