Electronic conductivity and structural distortion at the interface between insulators SrTiO3 and LaAlO3

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

doi:10.1002/pssa.200690015

Electronic conductivity and structural distortion at the interface between insulators SrTiO3 and LaAlO3

Materials Science 2016-08-16 v3 Strongly Correlated Electrons

Authors: J. -L. Maurice , C. Carretero , M. -J. Casanove , K. Bouzehouane , S. Guyard , É. Larquet , J. -P. Contour

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Abstract

When insulator LaAlO3 is grown by epitaxy onto a TiO2-terminated {100} surface of insulator SrTiO3, the resulting system has a metallic character. This phenomenon has been associated with an electrostatic frustration at the interface, as {100} surfaces of SrTiO3 are neutral while those of LaAlO3 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.

Keywords

界面电子导电性结构畸变 SrTiO3-LaAlO3 界面静电失衡载流子

Cite

@article{arxiv.cond-mat/0511123,
  title  = {Electronic conductivity and structural distortion at the interface between insulators SrTiO3 and LaAlO3},
  author = {J. -L. Maurice and C. Carretero and M. -J. Casanove and K. Bouzehouane and S. Guyard and É. Larquet and J. -P. Contour},
  journal= {arXiv preprint arXiv:cond-mat/0511123},
  year   = {2016}
}

Electronic conductivity and structural distortion at the interface between insulators SrTiO3 and LaAlO3

Abstract

Keywords

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