Effects of Electron Correlation on the Transport through a Quantum Dot Superlattice

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dc.creatorTanaka, Yoshihide
dc.creatorOguri, Akira
dc.date2003-10-10
dc.date.accessioned2026-07-07T02:54:07Z
dc.date.available2026-07-07T02:54:07Z
dc.descriptionWe study correlation effects on the transport through a quantum dot superlattice using a two-dimensional Hubbard model connected to two noninteracting leads. To calculate the zero-temperature conductance away from half-filling, we have used the non-magnetic solution of the Hartree-Fock approximation for the unperturbed Green's function, and then take into account the electron correlation beyond the mean field theory through the second-order self-energy corrections with respect to the residual interaction. When the value of the onsite potential $ε_d$ or the repulsion $U$ is changed, the conductance shows a number of peaks corresponding to the resonance states passing through the Fermi energy. The behavior of the resonance states for correlated electrons can be investigated using the eigenvalue of the effective Hamiltonian for a quasi-particle of a local Fermi liquid. We calculate the eigenvalue using the second-order self-energy, and show explicitly that it can be compared with the conductance peak.
dc.description26 pages included 14 figures, to appear in J. Phys. Soc. Jpn. vol. 73 No.1
dc.identifierhttps://arxiv.org/abs/cond-mat/0310237
dc.identifierhttp://arxiv.org/abs/cond-mat/0310237
dc.identifierJ. Phys. Soc. Jpn. vol. 73, 163(2004)
dc.identifierdoi:10.1143/JPSJ.73.163
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22417
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleEffects of Electron Correlation on the Transport through a Quantum Dot Superlattice
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