Breakdown of Fermi Liquid Theory in Doped Mott Insulators by Dynamical Spectral Weight Transfer

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dc.creatorPhillips, Philip
dc.creatorChoy, Ting-Pong
dc.creatorLeigh, Robert G.
dc.date2008-02-22
dc.date2008-05-30
dc.date.accessioned2026-07-07T09:41:28Z
dc.date.available2026-07-07T09:41:28Z
dc.descriptionWe show that doped Mott insulators exhibit a collective degree of freedom, not made out of the elemental excitations, because the number of single-particle addition states at low energy per electron per spin is greater than one. The presence of such a collective degree of freedom which is not a consequence of proximity to a phase transition is a consequence of dynamical spectral weight transfer from high to low energies. This physics is captured by the charge $2e$ boson that emerges by explicitly integrating out the high-energy scale in the Hubbard model. The charge $2e$ boson binds to a hole, thereby mediating new charge $e$ states at low energy. It is the presence of such charge $e$ states which have no counterpart in the non-interacting system that provides the general mechanism for the breakdown of Fermi liquid theory in doped Mott insulators. The relationship between the charge $2e$ boson formulation and the standard perturbative treatment is explained.
dc.description5 pages: Expanded version in which the breakdown of Fermi liquid theory is highlighted as a result of dynamical spectral weight transfer
dc.identifierhttps://arxiv.org/abs/0802.3405
dc.identifierhttp://arxiv.org/abs/0802.3405
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/161840
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleBreakdown of Fermi Liquid Theory in Doped Mott Insulators by Dynamical Spectral Weight Transfer
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