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26 April 2024 |
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Kondo Resonance in a Mesoscopic Ring Coupled to a Quantum Dot: Exact Results for the Aharonov-Bohm/Casher Effects | | H.-P. Eckle
; H. Johannesson
; C. A. Stafford
; | | Date: |
6 Oct 2000 | | Journal: | Phys. Rev. Lett. 87, 016602 (2001) | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated Electrons; Exactly Solvable and Integrable Systems | cond-mat.mes-hall cond-mat.str-el nlin.SI | | Abstract: | We study the persistent currents induced by both the Aharonov-Bohm and Aharonov-Casher effects in a one-dimensional mesoscopic ring coupled to a side-branch quantum dot at Kondo resonance. For privileged values of the Aharonov-Bohm-Casher fluxes, the problem can be mapped onto an integrable model, exactly solvable by a Bethe ansatz. In the case of a pure magnetic Aharonov-Bohm flux, we find that the presence of the quantum dot has no effect on the persistent current. In contrast, the Kondo resonance interferes with the spin-dependent Aharonov-Casher effect to induce a current which, in the strong-coupling limit, is independent of the number of electrons in the ring. | | Source: | arXiv, cond-mat/0010101 | | Services: | Forum | Review | PDF | Favorites | |
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