Correlated electron transport through parallel double-quantum-dot

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dc.creatorLu, Rong
dc.creatorLiu, Zhi-Rong
dc.creatorZhang, Guang-Ming
dc.date2005-04-12
dc.date.accessioned2026-07-07T03:04:42Z
dc.date.available2026-07-07T03:04:42Z
dc.descriptionWe investigate the spectral and transport properties of parallel double-quantum-dot (DQD) system with interdot tunneling coupling in both the equilibrium and nonequilibrium cases. The special geometry of DQD system is considered, in which each dot is connected to two leads by the tunneling barriers. With the help of Keldysh nonequilibrium Green function technique and the equation-of-motion approach, the spectral function and the conductance spectra of DQD system are calculated in two cases with and without the intradot Coulomb interaction, respectively. The exact calculation is performed in the absence of intradot Coulomb interaction. For the case with intradot Coulomb interaction, the Hartree-Fock approximation is applied to truncate the equation of motion for the high-order Green functions at high temperatures. The phenomenon of correlated electron transport is clearly shown in the linear conductance of each dot in the presence of interdot tunneling when setting one dot level and tuning another. The interplay between the intradot Coulomb interaction and the interdot tunneling coupling is displayed.
dc.description11 pages, 10 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0504288
dc.identifierhttp://arxiv.org/abs/cond-mat/0504288
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/26182
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleCorrelated electron transport through parallel double-quantum-dot
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