Emergent Collective Modes and Kinks in Electronic Dispersions

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dc.creatorRaas, Carsten
dc.creatorGrete, Patrick
dc.creatorUhrig, Götz S.
dc.date2008-09-11
dc.date2009-02-23
dc.date.accessioned2026-07-07T12:44:47Z
dc.date.available2026-07-07T12:44:47Z
dc.descriptionRecently, it was shown that strongly correlated metallic fermionic systems [Nature Phys. 3, 168 (2007)] generically display kinks in the dispersion of single fermions without the coupling to collective modes. Here we provide compelling evidence that the physical origin of these kinks are emerging internal collective modes of the fermionic systems. In the Hubbard model under study these modes are identified to be spin fluctuations which are the precursors of the spin excitations in the insulating phase. In spite of their damping the emergent modes give rise to signatures very similar to features of models including coupling to external modes.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0809.1911
dc.identifierhttp://arxiv.org/abs/0809.1911
dc.identifierPhys. Rev. Lett. 102, 076406 (2009)
dc.identifierdoi:10.1103/PhysRevLett.102.076406
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/220891
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleEmergent Collective Modes and Kinks in Electronic Dispersions
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