Giant Nonlinear Electron-lattice Interaction in Cuprate Superconductors, and Origin of the Pseudogap

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dc.creatorNistor, R. A
dc.creatorMartyna, G. J.
dc.creatorMueser, M. H.
dc.creatorNewns, D. M.
dc.creatorTsuei, C. C.
dc.date2009-02-17
dc.date.accessioned2026-07-07T12:43:26Z
dc.date.available2026-07-07T12:43:26Z
dc.descriptionThe pseudogap is a key property of the cuprate superconductors, whose understanding should illuminate the pairing mechanism. Recent experimental data support a close connection between the pseudogap and an oxygen-driven C4 symmetry breaking within the CuO2 plane unit cell. Using ab initio Molecular Dynamics, we demonstrate the existence of a strong nonlinear electron-oxygen vibrator coupling in two cuprates. In a mean field approach applied to this coupling within a model Hamiltonian, we derive a C4 splitting/pseudogap phase diagram in agreement with experiment - providing an explanation for the pseudogap phenomenon from first principles. The implications for superconductivity and the Fermi surface arc effect are discussed.
dc.description4 pages, 4 figures, with Supplementary material
dc.identifierhttps://arxiv.org/abs/0902.3015
dc.identifierhttp://arxiv.org/abs/0902.3015
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/220418
dc.subjectSuperconductivity
dc.titleGiant Nonlinear Electron-lattice Interaction in Cuprate Superconductors, and Origin of the Pseudogap
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