Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAIO3/SrTiO3 interface as a function of LaAIO3 growth conditions

J. L. Maurice; G. Herranz; C. Colliex; I. Devos; C. Carrétéro; A. Barthélémy; K. Bouzehouane; S. Fusil; D. Imhoff; É Jacquet; F. Jomard; D. Ballutaud; M. Basletic

doi:10.1209/0295-5075/82/17003

Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAIO₃/SrTiO₃ interface as a function of LaAIO₃ growth conditions

J. L. Maurice
, G. Herranz
, C. Colliex
, I. Devos
, C. Carrétéro
, A. Barthélémy
, K. Bouzehouane
, S. Fusil
, D. Imhoff
, É Jacquet
, F. Jomard
, D. Ballutaud
, M. Basletic

Unité Mixte de Physique CNRS/Thales
Laboratoire de Physique des Solides
Institut d'Électronique, de Microélectronique et de Nanotechnologie
Institut d'Electronique de Microélectronique et de Nanotechnologie (IEMN)
Centre national de la recherche scientifique

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

After the epitaxy of LaAlO₃ on a TiO₂-terminated {100} 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 analyse the Ti³⁺ ratio, characteristic of extra electrons. We find an interface concentration of Ti³⁺ that depends on growth conditions.

Original language	English
Article number	17003
Journal	EPL
Volume	82
Issue number	1
DOIs	https://doi.org/10.1209/0295-5075/82/17003
Publication status	Published - 1 Apr 2008
Externally published	Yes

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Maurice, J. L., Herranz, G., Colliex, C., Devos, I., Carrétéro, C., Barthélémy, A., Bouzehouane, K., Fusil, S., Imhoff, D., Jacquet, É., Jomard, F., Ballutaud, D., & Basletic, M. (2008). Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAIO₃/SrTiO₃ interface as a function of LaAIO₃ growth conditions. EPL, 82(1), Article 17003. https://doi.org/10.1209/0295-5075/82/17003

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title = "Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAIO3/SrTiO3 interface as a function of LaAIO3 growth conditions",

abstract = "After the epitaxy of LaAlO3 on a TiO2-terminated \{100\} 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 analyse the Ti3+ ratio, characteristic of extra electrons. We find an interface concentration of Ti3+ that depends on growth conditions.",

author = "Maurice, \{J. L.\} and G. Herranz and C. Colliex and I. Devos and C. Carr{\'e}t{\'e}ro and A. Barth{\'e}l{\'e}my and K. Bouzehouane and S. Fusil and D. Imhoff and {\'E} Jacquet and F. Jomard and D. Ballutaud and M. Basletic",

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Maurice, JL, Herranz, G, Colliex, C, Devos, I, Carrétéro, C, Barthélémy, A, Bouzehouane, K, Fusil, S, Imhoff, D, Jacquet, É, Jomard, F, Ballutaud, D & Basletic, M 2008, 'Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAIO₃/SrTiO₃ interface as a function of LaAIO₃ growth conditions', EPL, vol. 82, no. 1, 17003. https://doi.org/10.1209/0295-5075/82/17003

TY - JOUR

T1 - Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAIO3/SrTiO3 interface as a function of LaAIO3 growth conditions

AU - Maurice, J. L.

AU - Herranz, G.

AU - Colliex, C.

AU - Devos, I.

AU - Carrétéro, C.

AU - Barthélémy, A.

AU - Bouzehouane, K.

AU - Fusil, S.

AU - Imhoff, D.

AU - Jacquet, É

AU - Jomard, F.

AU - Ballutaud, D.

AU - Basletic, M.

PY - 2008/4/1

Y1 - 2008/4/1

N2 - After the epitaxy of LaAlO3 on a TiO2-terminated {100} 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 analyse the Ti3+ ratio, characteristic of extra electrons. We find an interface concentration of Ti3+ that depends on growth conditions.

AB - After the epitaxy of LaAlO3 on a TiO2-terminated {100} 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 analyse the Ti3+ ratio, characteristic of extra electrons. We find an interface concentration of Ti3+ that depends on growth conditions.

U2 - 10.1209/0295-5075/82/17003

DO - 10.1209/0295-5075/82/17003

M3 - Article

AN - SCOPUS:70449636839

SN - 0295-5075

VL - 82

JO - EPL

JF - EPL

IS - 1

M1 - 17003

ER -

Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAIO3/SrTiO3 interface as a function of LaAIO3 growth conditions

Abstract

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Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAIO₃/SrTiO₃ interface as a function of LaAIO₃ growth conditions