Nanometer scale electronic reconstruction at the interface between LaVO3 and LaVO4

Details Nanometer scale electronic reconstruction at the interface between LaVO3 and LaVO4 Nanometer scale electronic reconstruction at the interface between LaVO3 and LaVO4

2007-01-04

arxiv.org/abs/cond-mat/0701081v1

Phys. Rev. Lett. 97, 256803 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.97.256803

Electrons at interfaces, driven to minimize their free energy, are distributed differently than in bulk. This can be dramatic at interfaces involving heterovalent compounds. Here we profile an abrupt interface between V 3d2 LaVO3 and V 3d0 LaVO4 using electron energy loss spectroscopy. Although no bulk phase of LaVOx with a V 3d1 configuration exists, we find a nanometer-wide region of V 3d1 at the LaVO3/LaVO4 interface, rather than a mixture of V 3d0 and V 3d2. The two-dimensional sheet of 3d1 electrons is a prototypical electronic reconstruction at an interface between competing ground states.

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