6533b7cefe1ef96bd1257ace

RESEARCH PRODUCT

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

H P EckleH P EckleCharles A. StaffordHenrik Johannesson

subject

General Physics and AstronomyFOS: Physical sciences02 engineering and technologyElectron01 natural sciencesResonance (particle physics)Bethe ansatzCondensed Matter - Strongly Correlated Electronssymbols.namesakeQuantum mechanics0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)010306 general physicsAharonov–Bohm effectPhysicsMesoscopic physicsCondensed Matter - Mesoscale and Nanoscale PhysicsNonlinear Sciences - Exactly Solvable and Integrable SystemsCondensed matter physicsStrongly Correlated Electrons (cond-mat.str-el)Persistent currentQuantum Physics021001 nanoscience & nanotechnologyCondensed Matter::Mesoscopic Systems and Quantum Hall EffectQuantum dotsymbolsKondo effectExactly Solvable and Integrable Systems (nlin.SI)0210 nano-technology

description

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.

yearjournalcountryeditionlanguage
2000-10-05
https://dx.doi.org/10.48550/arxiv.cond-mat/0010101