Electron-Phonon Coupling in the Bulk of Anatase TiO2 Measured by Resonant Inelastic X-Ray Spectroscopy
Moser, S.; Fatale, S.; Krueger, P.; Berger, H.; Bugnon, P.; Magrez, A.; Niwa, H.; Miyawaki, J.; Harada, Y.; Grioni, M.
2015

Abstract

We investigate the polaronic ground state of anatase TiO2 by bulk-sensitive resonant inelastic x-ray spectroscopy (RIXS) at the Ti L-3 edge. We find that the formation of the polaron cloud involves a single 95 meV phonon along the c axis, in addition to the 108 meV ab-plane mode previously identified by photoemission. The coupling strength to both modes is the same within error bars, and it is unaffected by the carrier density. These data establish RIXS as a directional bulk-sensitive probe of electron-phonon coupling in solids.

Details

Title Electron-Phonon Coupling in the Bulk of Anatase TiO2 Measured by Resonant Inelastic X-Ray Spectroscopy
Author(s) Moser, S. ; Fatale, S. ; Krueger, P. ; Berger, H. ; Bugnon, P. ; Magrez, A. ; Niwa, H. ; Miyawaki, J. ; Harada, Y. ; Grioni, M.
Published in Physical Review Letters
Pagination 5
Volume 115
Issue 9
Pages 096404
Date 2015
Publisher College Pk, Amer Physical Soc
ISSN 0031-9007
DOI https://doi.org/10.1103/PhysRevLett.115.096404
Other identifier(s) View record in Web of Science
Laboratories LSE
Record Appears in Scientific production and competences > SB - School of Basic Sciences > SB Archives > LSE - Laboratory of Photoelectron Spectroscopy
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2015-09-28

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