Role of the different defects, their population and distribution in the LaAlO3 /SrTiO3 heterostructure's behavior

Hicham Zaid; Marie-Hélène Berger; Denis Jalabert; M. Walls; R. Akrobetu; N.J. Goble; X.P.A. Gao; P. Berger; I. Fongkaew; W. Lambrecht; A. Sehirlioglu

doi:10.1063/1.5024554

Journal articles

Role of the different defects, their population and distribution in the LaAlO3 /SrTiO3 heterostructure's behavior

Hicham Zaid ¹ Marie-Hélène Berger ¹ Denis Jalabert ² M. Walls ³ R. Akrobetu ⁴ N.J. Goble ⁴ X.P.A. Gao ⁴ P. Berger ⁵ I. Fongkaew ⁶ W. Lambrecht ⁴ A. Sehirlioglu ⁴

1 MAT - Centre des Matériaux

2 LEMMA - Laboratoire d'Etude des Matériaux par Microscopie Avancée

MEM - Modélisation et Exploration des Matériaux : DRF/IRIG/MEM

3 LPS - Laboratoire de Physique des Solides

4 Case Western Reserve University [Cleveland]

5 LEEL - UMR 3685 - Laboratoire d'Etudes des Eléments Légers

NIMBE UMR 3685 - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M)

6 SUT - Suranaree University of Technology

Abstract : Hetero-interfaces between epitaxial LaAlO3 films and SrTiO3 substrates can exhibit an insulator-metal transition at a critical film thickness above which a quasi-two-dimensional electron gas forms. This work aims to elucidate the significant role the defects play in determining the sources of non-mobile and mobile carriers, the critical thickness, and the dipolar field screening. A model is built based on a comprehensive investigation of the origin of charge carriers and the advanced analysis of structural factors that affect the electronic properties of these hetero-epitaxial interfaces.

Keywords : OXIDE INTERFACES ELECTRON-GAS CONDUCTIVITY HETEROINTERFACE MECHANISM MOBILITY STRAIN

Document type :

Journal articles

Domain :

Chemical Sciences / Material chemistry

Physics [physics] / Condensed Matter [cond-mat] / Materials Science [cond-mat.mtrl-sci]

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https://hal-cea.archives-ouvertes.fr/cea-01775862
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Submitted on : Tuesday, April 24, 2018 - 3:45:27 PM
Last modification on : Saturday, June 25, 2022 - 10:31:00 PM

Role of the different defects, their population and distribution in the LaAlO3 /SrTiO3 heterostructure's behavior

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Role of the different defects, their population and distribution in the LaAlO3 /SrTiO3 heterostructure's behavior

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