期刊
PHYSICAL REVIEW LETTERS
卷 101, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.216804
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资金
- GNSF [06-81-4-100]
The collective behavior of correlated electrons in the VO2 interface layer of the LaVO3/SrTiO3 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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