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Resonant soft x-ray scattering studies of interface reconstructions in SrTiO3/LaAlO3 superlattices

J. Appl. Phys. 106, 083705 (2009); doi:10.1063/1.3246788

Published 21 October 2009

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H. Wadati,1 D. G. Hawthorn,1 J. Geck,1 T. Higuchi,2 Y. Hikita,2 H. Y. Hwang,2,3 L. Fitting Kourkoutis,4 D. A. Muller,4 S.-W. Huang,5 D. J. Huang,5 H.-J. Lin,5 C. Schüßler-Langeheine,6 H.-H. Wu,5,6 E. Schierle,7 E. Weschke,7 N. J. C. Ingle,1 and G. A. Sawatzky1
1Department of Physics and Astronomy and AMPEL, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
2Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
3Japan Science and Technology Agency, Kawaguchi 332-0012, Japan
4School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA
5National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
6II. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, D-50937 Köln, Germany
7Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Str. 15, D-12489 Berlin, Germany
We present resonant soft x-ray scattering studies of Ti 3d and O 2p states at the interfaces of SrTiO3/LaAlO3 superlattices. From reflectivity analyses, focusing on the (003) peak which is forbidden for our “ideal” superlattice structure, we concluded that the LaO|TiO2/SrO and the SrO|AlO2/LaO interfaces have distinct reconstructions, breaking the heterostructure symmetry. ©2009 American Institute of Physics
History: Received 3 July 2009; accepted 15 September 2009; published 21 October 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/083705/1
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KEYWORDS and PACS

Keywords
PACS
  • 78.70.Ck
    X-ray scattering (condensed matter)
  • 68.65.Cd
    Superlattices (structure and nonelectronic properties)
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
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