Photoemission spectra of many-polaron systems

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dc.creatorHohenadler, M.
dc.creatorNeuber, D.
dc.creatorvon der Linden, W.
dc.creatorWellein, G.
dc.creatorLoos, J.
dc.creatorFehske, H.
dc.date2004-12-01
dc.date2005-04-08
dc.date.accessioned2026-07-07T06:25:43Z
dc.date.available2026-07-07T06:25:43Z
dc.descriptionThe cross over from low to high carrier densities in a many-polaron system is studied in the framework of the one-dimensional spinless Holstein model, using unbiased numerical methods. Combining a novel quantum Monte Carlo approach and exact diagonalization, accurate results for the single-particle spectrum and the electronic kinetic energy on fairly large systems are obtained. A detailed investigation of the quality of the Monte Carlo data is presented. In the physically most important adiabatic intermediate electron-phonon coupling regime, for which no analytical results are available, we observe a dissociation of polarons with increasing band filling, leading to normal metallic behavior, while for parameters favoring small polarons, no such density-driven changes occur. The present work points towards the inadequacy of single-polaron theories for a number of polaronic materials such as the manganites.
dc.description15 pages, 13 figures; final version, accepted for publication in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0412010
dc.identifierhttp://arxiv.org/abs/cond-mat/0412010
dc.identifierPhys. Rev. B 71, 245111 (2005)
dc.identifierdoi:10.1103/PhysRevB.71.245111
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/96906
dc.subjectStrongly Correlated Electrons
dc.titlePhotoemission spectra of many-polaron systems
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