TY - JOUR
T1 - Kondo resonance in a mesoscopic ring coupled to a quantum dot
T2 - Exact results for the aharonov-bohm-casher effects
AU - Eckle, H. P.
AU - Johannesson, H.
AU - Stafford, C. A.
PY - 2001
Y1 - 2001
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.87.016602
DO - 10.1103/PhysRevLett.87.016602
M3 - Article
AN - SCOPUS:39249084579
SN - 0031-9007
VL - 87
JO - Physical review letters
JF - Physical review letters
IS - 1
ER -