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

C. Schussler-Langeheine; D. G. Hawthorn; D. J. Huang; E. Schierle; E. Weschke; G. A. Sawatzky; H.-H. Wu; H.-J. Lin; H. Wadati; H. Y. Hwang

arxiv: 0810.1926 · v1 · submitted 2008-10-10 · ❄️ cond-mat.str-el · cond-mat.mtrl-sci

Electronic structure of the SrTiO₃/LaAlO₃ 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

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H.-J. Lin C. Schussler-Langeheine H.-H. Wu E. Schierle E. Weschke G. A. Sawatzky

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classification ❄️ cond-mat.str-el cond-mat.mtrl-sci

keywords electronicinterfacestructureanalyseslaalopeakreconstructionresonant

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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.

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Electronic structure of the SrTiO₃/LaAlO₃ interface revealed by resonant soft x-ray scattering

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