Electron Scattering at Dislocations in ${\mathrm{LaAlO}}_{3}/{\mathrm{SrTiO}}_{3}$ Interfaces

Electron Scattering at Dislocations in ${LaAlO}_{3} / {SrTiO}_{3}$ Interfaces

S. Thiel, C. W. Schneider, L. Fitting Kourkoutis, D. A. Muller, N. Reyren, A. D. Caviglia, S. Gariglio, J.-M. Triscone, and J. Mannhart

Phys. Rev. Lett. 102, 046809 – Published 30 January 2009

Abstract

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 ${LaAlO}_{3} / {SrTiO}_{3}$ interfaces has been measured and found to equal $\approx 5 nm$ . Our experiments reveal that the transport properties of these electron gases are strongly influenced by scattering at dislocation cores.

Received 1 July 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.046809

Authors & Affiliations

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

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

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Vol. 102, Iss. 4 — 30 January 2009

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Physical Review Letters

Electron Scattering at Dislocations in LaAlO3/SrTiO3 Interfaces

S. Thiel, C. W. Schneider, L. Fitting Kourkoutis, D. A. Muller, N. Reyren, A. D. Caviglia, S. Gariglio, J.-M. Triscone, and J. Mannhart

Phys. Rev. Lett. 102, 046809 – Published 30 January 2009

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Electron Scattering at Dislocations in ${LaAlO}_{3} / {SrTiO}_{3}$ Interfaces