Dubroka, Adam Rössle, Matthias Kim, Kyung Wan Malik, Vivek Kumar Schulz, Leander Thiel, S. Schneider, C. W. Mannhart, J. Herranz, G. Copie, O. Bibes, M. Barthélémy, A. Bernhard, Christian 2010-04-16 With infrared ellipsometry and transport measurements we investigated the electrons at the interface between LaAlO₃ and SrTiO₃. We obtained a sheet carrier concentration of N_s≈5–9×10¹³  cm⁻², an effective mass of m^*=3.2±0.4m_e, and a strongly frequency dependent mobility. The latter are similar as in bulk SrTi_1-xNb_xO₃ 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. application/pdf https://folia.unifr.ch/global/documents/301713 https://folia.unifr.ch/documents/301713/files/ber_drc.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.104.156807 info:eu-repo/semantics/openAccess License undefined Physical Review Letters. - 2010, vol. 104, p. 156807 info:eu-repo/classification/udc/53 Dynamical response and confinement of the electrons at the LaAlO₃/SrTiO₃ interface http://purl.org/coar/resource_type/c_6501