Indirect Exchange Interaction between two Quantum Dots in an Aharonov-Bohm Ring

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dc.creatorUtsumi, Yasuhiro
dc.creatorMartinek, Jan
dc.creatorBruno, Patrick
dc.creatorImamura, Hiroshi
dc.date2003-10-08
dc.date.accessioned2026-07-07T02:54:03Z
dc.date.available2026-07-07T02:54:03Z
dc.descriptionWe investigate the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between two spins located at two quantum dots embedded in an Aharonov-Bohm (AB) ring. In such a system the RKKY interaction, which oscillates as a function of the distance between two local spins, is affected by the flux. For the case of the ferromagnetic RKKY interaction, we find that the amplitude of AB oscillations is enhanced by the Kondo correlations and an additional maximum appears at half flux, where the interaction is switched off. For the case of the antiferromagnetic RKKY interaction, we find that the phase of AB oscillations is shifted by pi, which is attributed to the formation of a singlet state between two spins for the flux value close to integer value of flux.
dc.description10 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0310168
dc.identifierhttp://arxiv.org/abs/cond-mat/0310168
dc.identifierPhys. Rev. B 69, 155320 (2004)
dc.identifierdoi:10.1103/PhysRevB.69.155320
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22391
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleIndirect Exchange Interaction between two Quantum Dots in an Aharonov-Bohm Ring
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