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 et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 20290
- DOI 10.1103/PhysRevLett.104.156807
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301713
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