Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAlO3/SrTiO3 interface as a function of LaAlO3 growth conditions (CROSBI ID 137072)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Maurice, J.-L. ; Herranz, Gervasi ; Colliex, C. ; Devos, I. ; Carrétéro, C. ; Barthélémy, Agnes ; Bouzehouane, Karim ; Fusil, Stephen ; Imhoff, D. ; Jacquet, Éric ; Jomard, F. ; Ballutaud, D. ; Basletić, Mario
engleski
Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAlO3/SrTiO3 interface as a function of LaAlO3 growth conditions
After the epitaxy of LaAlO3 on a TiO2-terminated surface of SrTiO3, a high-mobility electron gas may appear, which has been the object of numerous works over the last four years. Its origin is a subject of debate between the interface polarity and unintended doping. Here we use electron energy loss "spectrum images", recorded in cross-section in a scanning transmission electron microscope, to analyze the Ti3+ ratio, characteristic of extra electrons. We find an interface concentration of Ti3+ that depends on growth conditions.
insulators; electron states at surfaces and interfaces; electron energy loss spectroscopy
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