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Title: Kondo Resonance in a Mesoscopic Ring Coupled to a Quantum Dot: Exact Results for the Aharonov-Bohm-Casher Effects

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 sidebranch 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.

Authors:
; ;
Publication Date:
Sponsoring Org.:
(US)
OSTI Identifier:
40204757
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 87; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevLett.87.016602; Othernumber: PRLTAO000087000001016602000001; 041127PRL; PBD: 2 Jul 2001; Journal ID: ISSN 0031-9007
Publisher:
The American Physical Society
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ELECTRONS; RESONANCE; AHARONOV-BOHM EFFECT

Citation Formats

Eckle, H -P, Johannesson, H, and Stafford, C A. Kondo Resonance in a Mesoscopic Ring Coupled to a Quantum Dot: Exact Results for the Aharonov-Bohm-Casher Effects. United States: N. p., 2001. Web. doi:10.1103/PhysRevLett.87.016602.
Eckle, H -P, Johannesson, H, & Stafford, C A. Kondo Resonance in a Mesoscopic Ring Coupled to a Quantum Dot: Exact Results for the Aharonov-Bohm-Casher Effects. United States. https://doi.org/10.1103/PhysRevLett.87.016602
Eckle, H -P, Johannesson, H, and Stafford, C A. 2001. "Kondo Resonance in a Mesoscopic Ring Coupled to a Quantum Dot: Exact Results for the Aharonov-Bohm-Casher Effects". United States. https://doi.org/10.1103/PhysRevLett.87.016602.
@article{osti_40204757,
title = {Kondo Resonance in a Mesoscopic Ring Coupled to a Quantum Dot: Exact Results for the Aharonov-Bohm-Casher Effects},
author = {Eckle, H -P and Johannesson, H and Stafford, C A},
abstractNote = {We study the persistent currents induced by both the Aharonov-Bohm and Aharonov-Casher effects in a one-dimensional mesoscopic ring coupled to a sidebranch 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.},
doi = {10.1103/PhysRevLett.87.016602},
url = {https://www.osti.gov/biblio/40204757}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 1,
volume = 87,
place = {United States},
year = {Mon Jul 02 00:00:00 EDT 2001},
month = {Mon Jul 02 00:00:00 EDT 2001}
}