Inelastic x-ray scattering in heterostructures: electronic excitations in LaAlO3/SrTiO3.
J Phys Condens Matter
; 27(33): 335501, 2015 Aug 26.
Article
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| MEDLINE
| ID: mdl-26221981
ABSTRACT
We present an investigation of the valence-electron excitation spectra including the collective plasmon modes of SrTiO3, LaAlO3 and their heterostructures with non-resonant inelastic x-ray scattering. We analyse the spectra using calculations based on first principles and atomic multiplet models. We demonstrate the feasibility of performing valence IXS experiments in a total reflection geometry. Surprisingly, we find that the plasmon, interband and semicore excitations in multilayers are well described as a superposition of bulk-compound spectra even in a superstructure composing of layers of only one atomic layer thickness.
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Banco de datos:
MEDLINE
Idioma:
En
Revista:
J Phys Condens Matter
Asunto de la revista:
BIOFISICA
Año:
2015
Tipo del documento:
Article
País de afiliación:
Finlandia