Bipolaron formation in 1D-3D quantum dots: A lattice quantum Monte Carlo approach

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dc.creatorHohenadler, Martin
dc.creatorFehske, Holger
dc.date2006-11-22
dc.date2007-01-05
dc.date.accessioned2026-07-07T08:05:40Z
dc.date.available2026-07-07T08:05:40Z
dc.descriptionPolaron and bipolaron formation in the Holstein-Hubbard model with harmonic confinement potential, relevant to quantum dot structures, is investigated in one to three dimensions by means of unbiased quantum Monte Carlo simulations. The discrete nature of the lattice and quantum phonon effects are fully taken into account. The dependence on phonon frequency, Coulomb repulsion, confinement strength (dot size) and electron-phonon interaction strength is studied over a wide range of parameter values. Confinement is found to reduce the size of (bi-)polarons at a given coupling strength, to reduce the critical coupling for small-(bi-)polaron formation, to increase the polaron binding energy, and to be more important in lower dimensions. The present method also permits to consider models with dispersive phonons, anharmonic confinement, or long-range interactions.
dc.description15 pages, 7 figures, accepted for publication in J. Phys.: Condens. Matter; final version; discussion of confinement effects on bipolaron binding energy corrected
dc.identifierhttps://arxiv.org/abs/cond-mat/0611586
dc.identifierhttp://arxiv.org/abs/cond-mat/0611586
dc.identifierJ. Phys.: Condens. Matter 19, 255210 (2007)
dc.identifierdoi:10.1088/0953-8984/19/25/255210
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/130350
dc.subjectStrongly Correlated Electrons
dc.subjectMesoscale and Nanoscale Physics
dc.titleBipolaron formation in 1D-3D quantum dots: A lattice quantum Monte Carlo approach
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