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Proceedings Paper

Electronic reconstruction in correlated electron heterostructures
Author(s): Satoshi Okamoto; Andrew J. Millis
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Paper Abstract

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., 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 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.

Paper Details

Date Published: 30 August 2005
PDF: 17 pages
Proc. SPIE 5932, Strongly Correlated Electron Materials: Physics and Nanoengineering, 593218 (30 August 2005); doi: 10.1117/12.623199
Show Author Affiliations
Satoshi Okamoto, Columbia Univ. (United States)
Andrew J. Millis, Columbia Univ. (United States)

Published in SPIE Proceedings Vol. 5932:
Strongly Correlated Electron Materials: Physics and Nanoengineering
Ivan Bozovic; Davor Pavuna, Editor(s)

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