Orbital reconstruction and the two-dimensional electron gas at the LaAlO3/SrTiO3 interface

M. Salluzzo, J.C. Cezar, N.B. Brookes, V. Bisogni, G.M. Di Luca, G.M. De Luca, C. Richter, C. Richter, S. Thiel, J. Mannhart, Mark Huijben, Alexander Brinkman, Augustinus J.H.M. Rijnders, G. Ghiringhelli

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235 Citations (Scopus)

Abstract

In 2004, Ohtomo and Hwang discovered that an electron gas is created at the interface between insulating LaAlO3 and SrTiO3 compounds. Here we show that the generation of a conducting electron gas is related to an orbital reconstruction occurring at the LaAlO3/SrTiO3 interface. Our results are based on extensive investigations of the electronic properties and of the orbital structure of the interface using x-ray absorption spectroscopy. In particular, we find that the degeneracy of the Ti 3d states is fully removed and that the Ti 3dxy levels become the first available states for conducting electrons
Original languageUndefined
Pages (from-to)166804-
JournalPhysical review letters
Volume102
Issue number16
DOIs
Publication statusPublished - 2009

Keywords

  • METIS-259190
  • IR-73731

Cite this

Salluzzo, M., Cezar, J. C., Brookes, N. B., Bisogni, V., Di Luca, G. M., De Luca, G. M., ... Ghiringhelli, G. (2009). Orbital reconstruction and the two-dimensional electron gas at the LaAlO3/SrTiO3 interface. Physical review letters, 102(16), 166804-. https://doi.org/10.1103/PhysRevLett.102.166804