Phys. Rev. Lett. 102, 046809 (2009) [4 pages]

Electron Scattering at Dislocations in LaAlO₃/SrTiO₃ Interfaces

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S. Thiel¹, C. W. Schneider¹, L. Fitting Kourkoutis², D. A. Muller², N. Reyren³, A. D. Caviglia³, S. Gariglio³, J.-M. Triscone³, and J. Mannhart^1,*
¹Experimental Physics VI, EKM, University of Augsburg, Germany
²School of Applied and Engineering Physics, Cornell University, Ithaca, New York, USA
³Département de Physique de la Matière Condensée, University of Geneva, Switzerland

Received 1 July 2008; published 30 January 2009

We report experimental investigations of the effects of microstructural defects and of disorder on the properties of 2D electron gases at oxide interfaces. The cross section for scattering of electrons at dislocations in LaAlO₃/SrTiO₃ interfaces has been measured and found to equal ≈5 nm. Our experiments reveal that the transport properties of these electron gases are strongly influenced by scattering at dislocation cores.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.102.046809

DOI:

10.1103/PhysRevLett.102.046809

PACS:

73.40.−c

^*Corresponding author: Jochen.Mannhart@Physik.Uni-Augsburg.de

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Phys. Rev. Lett. 102, 046809 (2009) [4 pages]

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