Two-channel Kondo tunneling in triple quantum dot

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dc.creatorKuzmenko, T.
dc.creatorKikoin, K.
dc.creatorAvishai, Y.
dc.date2002-11-14
dc.date2003-02-11
dc.date.accessioned2026-07-07T06:25:54Z
dc.date.available2026-07-07T06:25:54Z
dc.descriptionThe effective spin Hamiltonian of a triple quantum dot with odd electron occupation weakly connected in series with left ($l$) and right ($r$) metal leads is composed of two-channel exchange and co-tunneling terms. Renormalization group equations for the corresponding three exchange constants $J_{l}$, $J_{r}$ and $J_{lr}$ are solved (to third order). Since $J_{lr}$ is relevant, the system is mapped on an anisotropic two-channel Kondo problem. The structure of the conductance as function of temperature and gate voltage implies that in the weak and intermediate coupling regimes, two-channel Kondo physics persists at temperatures as low as several $T_{K}$. At even electron occupation, the number of channels equals twice the spin of the triple dot (hence it is a fully screened impurity).
dc.description4 revtex pages with 4 .eps figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0211281
dc.identifierhttp://arxiv.org/abs/cond-mat/0211281
dc.identifierEurophys. Lett., 64 (2003), 218
dc.identifierdoi:10.1209/epl/i2003-00296-0
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/96962
dc.subjectStrongly Correlated Electrons
dc.titleTwo-channel Kondo tunneling in triple quantum dot
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