Effect of a Variable-Spin Quantum Dot on a Wire Conductance

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dc.creatorDavidovich, Maria A.
dc.creatorAnda, E. V.
dc.creatorBusser, C. A.
dc.creatorChiappe, G.
dc.date2001-06-27
dc.date.accessioned2026-07-07T02:41:55Z
dc.date.available2026-07-07T02:41:55Z
dc.descriptionA numerically exact calculation of the T=0 transport properties of a quantum wire interacting with a lateral two-level quantum dot is presented. The wire conductance is calculated for all different states of charge and spin of the quantum dot. For a dot with two electrons we obtain an enhancement of the Kondo temperature at the singlet-triplet transition and a non-universal scaling law for its dependence upon the dot energy spacing. We find that the Kondo correlation is stronger for a dot spin $S_D \sim 1$ than for $S_D \sim 1/2$. In both cases the wire current is totally quenched by the Kondo effect. When the dot is in the mixed-valence regime and $1/2 < S_D < 1$ the wire conductance is partially quenched except in a very small region of gate potential where it reaches the maximum value $e^2/h$.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0106564
dc.identifierhttp://arxiv.org/abs/cond-mat/0106564
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17935
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.titleEffect of a Variable-Spin Quantum Dot on a Wire Conductance
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