Direct Role of Structural Dynamics in Electron-Lattice Coupling of Superconducting Cuprates

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dc.creatorCarbone, F.
dc.creatorYang, D. -S.
dc.creatorGiannini, E.
dc.creatorZewail, A. H.
dc.date2009-01-15
dc.date.accessioned2026-07-07T12:32:52Z
dc.date.available2026-07-07T12:32:52Z
dc.descriptionThe mechanism of electron pairing in high-temperature superconductors is still the subject of intense debate. Here, we provide direct evidence of the role of structural dynamics, with selective atomic motions (buckling of copper-oxygen planes), in the anisotropic electronlattice coupling. The transient structures were determined using time-resolved electron diffraction, following carrier excitation with polarized femtosecond heating pulses, and examined for different dopings and temperatures. The deformation amplitude reaches 0.5 % of the c-axis value of 30 A when the light polarization is in the direction of the copper-oxygen bond, but its decay slows down at 45 degrees. These findings suggest a selective dynamical lattice involvement with the anisotropic electron-phonon coupling being on a time scale (1 to 3.5 ps depending on direction) of the same order of magnitude as that of the spin exchange of electron pairing in the high-temperature superconducting phase.
dc.description26 pages, 7 pages
dc.identifierhttps://arxiv.org/abs/0901.2355
dc.identifierhttp://arxiv.org/abs/0901.2355
dc.identifierPNAS 2008 105:20161-20166
dc.identifierdoi:10.1073/pnas.0811335106
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216928
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleDirect Role of Structural Dynamics in Electron-Lattice Coupling of Superconducting Cuprates
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