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Strongly-correlated heterostructures Satoshi Okamoto

Summary: Strongly-correlated heterostructures
Satoshi Okamoto
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
Electronic phase behavior in correlated-electron systems is a fundamental problem of condensed
matter physics. The change in the phase behavior near the surface and interface, i.e., electronic
reconstruction, is therefore the fundamental issue of the correlated-electron surface or interface
science. In addition to basic science, understanding of such a phase behavior is of crucial importance
for potential devices exploiting the novel properties of the correlated systems. In this article, we
present a general overview of the field, and then discuss the recent theoretical progress mainly
focusing on the correlation effects. We illustrate the general concept of electronic reconstruction
by studying model heterostructures consisting of strongly-correlated systems. Future directions for
research are also discussed.
"Correlated-electron systems" such as transition metal
oxides have been a focus of materials science for decades
because of their exotic behavior which originates from
strong electron-electron or electron-lattice interactions
and may be incompatible with the standard "density
functional" theory (DFT). Most compounds used for the
present electronic devices are described by the DFT. In


Source: Ahlers, Guenter - Department of Physics, University of California at Santa Barbara


Collections: Physics