Electronic structure of the SrTiO$_3$/LaAlO$_3$ interface revealed by resonant soft x-ray scattering

H. Wadati; D. G. Hawthorn; J. Geck; T. Higuchi; Y. Hikita; H. Y. Hwang; S. -W. Huang; D. J. Huang; H. -J. Lin; C. Schussler-Langeheine; H. -H. Wu; E. Schierle; E. Weschke; G. A. Sawatzky

doi:10.1063/1.3246788

Electronic structure of the SrTiO$_3$/LaAlO$_3$ interface revealed by resonant soft x-ray scattering

Strongly Correlated Electrons 2009-10-22 v1 Materials Science

Authors: H. Wadati , D. G. Hawthorn , J. Geck , T. Higuchi , Y. Hikita , H. Y. Hwang , S. -W. Huang , D. J. Huang , H. -J. Lin , C. Schussler-Langeheine , H. -H. Wu , E. Schierle , E. Weschke , G. A. Sawatzky

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Abstract

We investigated the electronic structure of the SrTiO $_3$ /LaAlO $_3$ superlattice (SL) by resonant soft x-ray scattering. The (003) peak, which is forbidden for our "ideal" SL structure, was observed at all photon energies, indicating reconstruction at the interface. From the peak position analyses taking into account the effects of refraction, we obtained evidence for electronic reconstruction of Ti 3d and O $2p$ states at the interface. From reflectivity analyses, we concluded that the AlO $_2$ /LaO/TiO $_2$ /SrO and the TiO $_2$ /SrO/AlO $_2$ /LaO interfaces are quite different, leading to highly asymmetric properties.

Keywords

resonant soft x-ray scattering SrTiO3/LaAlO3 interface electronic reconstruction superlattice interface asymmetry Ti 3d states O 2p states

Cite

@article{arxiv.0810.1926,
  title  = {Electronic structure of the SrTiO$_3$/LaAlO$_3$ interface revealed by resonant soft x-ray scattering},
  author = {H. Wadati and D. G. Hawthorn and J. Geck and T. Higuchi and Y. Hikita and H. Y. Hwang and S. -W. Huang and D. J. Huang and H. -J. Lin and C. Schussler-Langeheine and H. -H. Wu and E. Schierle and E. Weschke and G. A. Sawatzky},
  journal= {arXiv preprint arXiv:0810.1926},
  year   = {2009}
}

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5 pages, 4 figures

Electronic structure of the SrTiO$_3$/LaAlO$_3$ interface revealed by resonant soft x-ray scattering

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