Charge transfer in heterostructures of strongly correlated materials

Details Charge transfer in heterostructures of strongly correlated materials Charge transfer in heterostructures of strongly correlated materials

2008-01-14

arxiv.org/abs/0801.2174v2

Physics

Condensed Matter

Strongly Correlated Electrons

14 pages, 9 figures. Invited article for a special issue of JPCM on Metal Oxide Thin Films; minor changes in the text

Scientific paper

10.1088/0953-8984/20/26/264002

In this manuscript, recent theoretical investigations by the authors in the area of oxide multilayers are briefly reviewed. The calculations were carried out using model Hamiltonians and a variety of non-perturbative techniques. Moreover, new results are also included here. They correspond to the generation of a metallic state by mixing insulators in a multilayer geometry, using the Hubbard and Double Exchange models. For the latter, the resulting metallic state is also ferromagnetic. This illustrates how electron or hole doping via transfer of charge in multilayers can lead to the study of phase diagrams of transition metal oxides in the clean limit. Currently, these phase diagrams are much affected by the disordering standard chemical doping procedure, which introduces quenched disorder in the material.

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