title: Mixed lattice and electronic states in high-temperature superconductors.
abstract: Inelastic neutron scattering measurements are presented which show the abrupt development of new oxygen lattice vibrations near the doping-induced metal-insulator transition in La(2--x)Sr(x)CuO(4). A direct correlation is established between these lattice modes and the electronic susceptibility (as measured by photoemission) inferring that such modes mix strongly with charge fluctuations. This electron-lattice coupling can be characterized as a localized one-dimensional response of the lattice to short-ranged metallic charge fluctuations.
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. mcqueeny@lanl.gov
authors.forename: R J
authors.initials: RJ
authors.lastname: McQueeney
authors.forename: J L
authors.initials: JL
authors.lastname: Sarrao
authors.forename: P G
authors.initials: PG
authors.lastname: Pagliuso
authors.forename: P W
authors.initials: PW
authors.lastname: Stephens
authors.forename: R
authors.initials: R
authors.lastname: Osborn