PMID: 19113438Dec 31, 2008Paper

Spin, orbital, and charge order at the interface between correlated oxides

Physical Review Letters
G Jackeli, G Khaliullin

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.

References

May 22, 1998·Science·K UedaT Kawai
Jan 3, 2001·Physical Review Letters·S MiyasakaY Tokura
Aug 3, 2004·Science·Hiroyuki YamadaYoshinori Tokura
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Feb 1, 2008·Physical Review Letters·Jirí Chaloupka, Giniyat Khaliullin
Feb 1, 2008·Physical Review Letters·Y HottaH Y Hwang

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Citations

Jan 25, 2012·Nature Materials·H Y HwangY Tokura
Feb 8, 2011·Nature Materials·Eva BenckiserBernhard Keimer
Feb 2, 2013·Physical Review Letters·Wojciech BrzezickiAndrzej M Oleś

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