TY - JOUR
T1 - Inelastic x-ray scattering in heterostructures
T2 - electronic excitations in LaAlO3/SrTiO3
AU - Ruotsalainen, Kari O.
AU - Sahle, Christoph J.
AU - Ritschel, Tobias
AU - Geck, Jochen
AU - Hosoda, Masayuki
AU - Bell, Christopher
AU - Hikita, Yasuyuki
AU - Hwang, Harold Y.
AU - Fister, Tim T.
AU - Gordon, Robert A.
AU - Hämäläinen, Keijo
AU - Hakala, Mikko
AU - Huotari, Simo
AU - Bell, Chris
PY - 2015/8/26
Y1 - 2015/8/26
N2 - 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.
AB - 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.
KW - Electronic structure
KW - Heterostructures
KW - Inelastic x-ray scattering
UR - http://www.scopus.com/inward/record.url?scp=84938768082&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/27/33/335501
DO - 10.1088/0953-8984/27/33/335501
M3 - Article (Academic Journal)
C2 - 26221981
VL - 27
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
SN - 0953-8984
IS - 33
M1 - 335501
ER -