Electronic reconstruction in correlated electron heterostructures

Details Electronic reconstruction in correlated electron heterostructures Electronic reconstruction in correlated electron heterostructures

2005-07-06

arxiv.org/abs/cond-mat/0507150v1

Physics

Condensed Matter

Strongly Correlated Electrons

Proceedings of SPIE conference on Strongly Correlated Electron Materials: Physics and Nanoengineering, San Diego, CA, 31 July

Scientific paper

Electronic phase behavior in correlated-electron systems is a fundamental problem of condensed matter physics. We argue here that the change in the phase behavior near the surface and interface, i.e., {\em electronic reconstruction}, is the fundamental issue of the correlated-electron surface or interface science. Beyond its importance to basic science, understanding of this behavior is crucial for potential devices exploiting the novel properties of the correlated systems. % We present a general overview of the field, and then illustrate the general concepts by theoretical studies of the model heterostructures comprised of a Mott-insulator and a band-insulator, which show that spin (and orbital) orderings in thin heterostructures are generically different from the bulk and that the interface region, about three-unit-cell wide, is always metallic, demonstrating that {\em electronic reconstruction} generally occurs. % Predictions for photoemission experiments are made to show how the electronic properties change as a function of position, and the magnetic phase diagram is determined as a function of temperature, number of layers, and interaction strength. Future directions for research are also discussed.

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