Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAlO3/SrTiO3 interface as a function of LaAlO3 growth conditions

被引：28

作者：

Maurice, J. -L. ^{[1
,2
]}

Herranz, G. ^{[1
,2
]}

Colliex, C. ^{[3
]}

Devos, I. ^{[4
]}

Carretero, C. ^{[1
,2
]}

Barthelemy, A. ^{[1
,2
]}

Bouzehouane, K. ^{[1
,2
]}

Fusil, S. ^{[1
,2
]}

Imhoff, D. ^{[3
]}

Jacquet, E. ^{[1
,2
]}

Jomard, F. ^{[5
]}

Ballutaud, D. ^{[5
]}

Basletic, M. ^{[1
,2
]}

机构：

[1] CNRS Thales, Unite Mixte Phys, F-91767 Palaiseau, France

[2] Univ Paris 11, F-91767 Palaiseau, France

[3] Univ Paris 11, CNRS, Phys Solides Lab, UMR8502, F-91405 Orsay, France

[4] Inst Electron, CNRS, UMR 8520, F-59652 Villeneuve Dascq, France

[5] CNRS, GEMaC, UMR 8635, F-92195 Meudon, France

来源：

EPL | 2008年 / 82卷 / 01期

关键词：

D O I：

10.1209/0295-5075/82/17003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

After the epitaxy of LaAlO(3) on a TiO(2)-terminated {100} surface of SrTiO(3), 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 Ti(3+) ratio, characteristic of extra electrons. We find an interface concentration of Ti(3+) that depends on growth conditions. Copyright (c) EPLA, 2008.

引用

页数：6

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