Quasiparticle-like peaks, kinks and electron-phonon coupling atthe (Pi,0) regions in the cmr oxide la2-2xsr1+2xmn2o7

Using Angle-Resolved Photoemission (ARPES), we present the first observation of sharp quasiparticle-like peaks in a CMR manganite. We focus on the (pi,0) regions of k-space and study their electronic scattering rates and dispersion kinks, uncovering the critical energy scales, momentum scales, and s...

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Bibliographic Details
Published in:Physical review letters 2005-10, Vol.97
Main Authors: Sun, Z., Chuang, Y.-D., Fedorov, A.V., Douglas, J. F., Reznik,D., Weber, F., Aliouane, N., Argyriou, D. N., Zheng, H., Mitchel,l J. F., Kimura, T., Tokura, Y., Revcolevschi, A., Dessau, D.S.
Format: Article
Language:English
Subjects:
BOSONS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON-PHONON COUPLING
ELECTRONS
ENERGY RANGE
NEUTRONS
OXIDES
OXYGEN
PHONONS
PHOTOEMISSION
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
SCATTERING
Strongly Correlated Electrons advanced light sourceals
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Summary:Using Angle-Resolved Photoemission (ARPES), we present the first observation of sharp quasiparticle-like peaks in a CMR manganite. We focus on the (pi,0) regions of k-space and study their electronic scattering rates and dispersion kinks, uncovering the critical energy scales, momentum scales, and strengths of the interactions that renormalize the electrons. To identify these bosons we measured phonon dispersions in the energy range of the kink by inelastic neutron scattering (INS), finding a good match in both energy and momentum to the oxygen bond-stretching phonons.
ISSN:0031-9007
1079-7114