Electronic conductivity and structural distortion at the interface between insulators SrTiO 3 and LaAlO 3

J. L. Maurice; C. Carrétéro; M. J. Casanove; K. Bouzehouane; S. Guyard; É Larquet; J. P. Contour

doi:10.1002/pssa.200566033

Electronic conductivity and structural distortion at the interface between insulators SrTiO ₃ and LaAlO ₃

J. L. Maurice
, C. Carrétéro
, M. J. Casanove
, K. Bouzehouane
, S. Guyard
, É Larquet
, J. P. Contour

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

Abstract

When insulator LaAlO ₃ is grown by epitaxy onto a TiO ₂-terminated {100} surface of insulator SrTiO ₃, the system obtained has a metallic character. This phenomenon has been associated with an electrostatic frustration at the interface, as {100} surfaces of SrTiO ₃ are neutral while those of LaAlO ₃ are polar, but its microscopic mechanism is not quite understood. Here, we present a structural characterisation of this interface by aberration-corrected transmission electron microscopy. The unit cells at the interface appear elongated: we discuss this distortion in terms of electrostatic charge and extra carriers at the interface.

Original language	English
Pages (from-to)	2209-2214
Number of pages	6
Journal	Physica Status Solidi (A) Applications and Materials Science
Volume	203
Issue number	9
DOIs	https://doi.org/10.1002/pssa.200566033
Publication status	Published - 1 Jul 2006

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10.1002/pssa.200566033

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title = "Electronic conductivity and structural distortion at the interface between insulators SrTiO 3 and LaAlO 3 ",

abstract = "When insulator LaAlO 3 is grown by epitaxy onto a TiO 2-terminated \{100\} surface of insulator SrTiO 3, the system obtained has a metallic character. This phenomenon has been associated with an electrostatic frustration at the interface, as \{100\} surfaces of SrTiO 3 are neutral while those of LaAlO 3 are polar, but its microscopic mechanism is not quite understood. Here, we present a structural characterisation of this interface by aberration-corrected transmission electron microscopy. The unit cells at the interface appear elongated: we discuss this distortion in terms of electrostatic charge and extra carriers at the interface.",

author = "Maurice, \{J. L.\} and C. Carr{\'e}t{\'e}ro and Casanove, \{M. J.\} and K. Bouzehouane and S. Guyard and {\'E} Larquet and Contour, \{J. P.\}",

year = "2006",

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doi = "10.1002/pssa.200566033",

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T1 - Electronic conductivity and structural distortion at the interface between insulators SrTiO 3 and LaAlO 3

AU - Maurice, J. L.

AU - Carrétéro, C.

AU - Casanove, M. J.

AU - Bouzehouane, K.

AU - Guyard, S.

AU - Larquet, É

AU - Contour, J. P.

PY - 2006/7/1

Y1 - 2006/7/1

N2 - When insulator LaAlO 3 is grown by epitaxy onto a TiO 2-terminated {100} surface of insulator SrTiO 3, the system obtained has a metallic character. This phenomenon has been associated with an electrostatic frustration at the interface, as {100} surfaces of SrTiO 3 are neutral while those of LaAlO 3 are polar, but its microscopic mechanism is not quite understood. Here, we present a structural characterisation of this interface by aberration-corrected transmission electron microscopy. The unit cells at the interface appear elongated: we discuss this distortion in terms of electrostatic charge and extra carriers at the interface.

AB - When insulator LaAlO 3 is grown by epitaxy onto a TiO 2-terminated {100} surface of insulator SrTiO 3, the system obtained has a metallic character. This phenomenon has been associated with an electrostatic frustration at the interface, as {100} surfaces of SrTiO 3 are neutral while those of LaAlO 3 are polar, but its microscopic mechanism is not quite understood. Here, we present a structural characterisation of this interface by aberration-corrected transmission electron microscopy. The unit cells at the interface appear elongated: we discuss this distortion in terms of electrostatic charge and extra carriers at the interface.

U2 - 10.1002/pssa.200566033

DO - 10.1002/pssa.200566033

M3 - Article

AN - SCOPUS:33746373509

SN - 1862-6300

VL - 203

SP - 2209

EP - 2214

JO - Physica Status Solidi (A) Applications and Materials Science

JF - Physica Status Solidi (A) Applications and Materials Science

IS - 9

ER -

Electronic conductivity and structural distortion at the interface between insulators SrTiO 3 and LaAlO 3

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Electronic conductivity and structural distortion at the interface between insulators SrTiO ₃ and LaAlO ₃