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

Research output: Contribution to journalArticle

47 Scopus citations

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.

Original languageEnglish (US)
JournalPhysical review letters
Volume87
Issue number1
DOIs
StatePublished - Jan 1 2001

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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