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  • Title: Spin, orbital, and charge order at the interface between correlated oxides.
    Author: Jackeli G, Khaliullin G.
    Journal: Phys Rev Lett; 2008 Nov 21; 101(21):216804. PubMed ID: 19113438.
    Abstract:
    The collective behavior of correlated electrons in the VO2 interface layer of the LaVO(3)/SrTiO(3) heterostructure is studied within a quarter-filled t(2g)-orbital Hubbard model on a square lattice. We argue that the ground state is ferromagnetic, driven by the double-exchange mechanism, and is orbitally and charge ordered due to a confined geometry and electron correlations. The orbital and charge density waves open gaps on the entire Fermi surfaces of all orbitals. The theory explains the observed insulating behavior of the p-type interface between LaVO3 and SrTiO3.
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