Journal article

Dynamical response and confinement of the electrons at the LaAlO₃/SrTiO₃ interface

  • Dubroka, Adam University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Rössle, Matthias University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Kim, Kyung Wan University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Malik, Vivek Kumar University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Schulz, Leander University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Thiel, S. Experimental Physics VI, Institute of Physics, University of Augsburg, Germany
  • Schneider, C. W. Experimental Physics VI, Institute of Physics, University of Augsburg, Germany - Paul Scherrer Institut, Materials Group, Villigen, Switzerland
  • Mannhart, J. Experimental Physics VI, Institute of Physics, University of Augsburg, Germany
  • Herranz, G. Unité Mixte de Physique CNRS/Thales, Palaiseau, France
  • Copie, O. Unité Mixte de Physique CNRS/Thales, Palaiseau, France
  • Bibes, M. Unité Mixte de Physique CNRS/Thales, Palaiseau, France
  • Barthélémy, A. Unité Mixte de Physique CNRS/Thales, Palaiseau, France
  • Bernhard, Christian University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
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    16.04.2010
Published in:
  • Physical Review Letters. - 2010, vol. 104, p. 156807
English With infrared ellipsometry and transport measurements we investigated the electrons at the interface between LaAlO₃ and SrTiO₃. We obtained a sheet carrier concentration of Ns≈5–9×10¹³  cm⁻², an effective mass of m*=3.2±0.4me, and a strongly frequency dependent mobility. The latter are similar as in bulk SrTi1-xNbxO₃ and therefore suggestive of polaronic correlations. We also determined the vertical concentration profile which has a strongly asymmetric shape with a rapid initial decay over the first 2 nm and a pronounced tail that extends to about 11 nm.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
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Persistent URL
https://folia.unifr.ch/unifr/documents/301713
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