title: Role of lattice coupling in establishing electronic and magnetic properties in quasi-one-dimensional cuprates.
abstract: High resolution resonant inelastic x-ray scattering has been performed to reveal the role of lattice coupling in a family of quasi-1D insulating cuprates, Ca2+5xY2-5xCu5O10. Site-dependent low-energy excitations arising from progressive emissions of a 70 meV lattice vibrational mode are resolved for the first time, providing a direct measurement of electron-lattice coupling strength. We show that such electron-lattice coupling causes doping-dependent distortions of the Cu-O-Cu bond angle, which sets the intrachain spin exchange interactions. Our results indicate that the lattice degrees of freedom are fully integrated into the electronic behavior in low-dimensional systems.
authors.affiliation: SIMES, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA. leews@stanford.edu
authors.forename: W S
authors.initials: WS
authors.lastname: Lee
authors.forename: S
authors.initials: S
authors.lastname: Johnston
authors.forename: B
authors.initials: B
authors.lastname: Moritz
authors.forename: J
authors.initials: J
authors.lastname: Lee
authors.forename: M
authors.initials: M
authors.lastname: Yi
authors.forename: K J
authors.initials: KJ
authors.lastname: Zhou
authors.forename: T
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authors.lastname: Schmitt
authors.forename: L
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authors.lastname: Patthey
authors.forename: V
authors.initials: V
authors.lastname: Strocov
authors.forename: K
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authors.lastname: Kudo
authors.forename: Y
authors.initials: Y
authors.lastname: Koike
authors.forename: J
authors.initials: J
authors.lastname: van den Brink
authors.forename: T P
authors.initials: TP
authors.lastname: Devereaux
authors.forename: Z X
authors.initials: ZX
authors.lastname: Shen