Chapter

A brief introduction to strongly correlated electronic materials

E. Dagotto and Y. Tokura

in Multifunctional Oxide Heterostructures

Published in print August 2012 | ISBN: 9780199584123
Published online January 2013 | e-ISBN: 9780191745331 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199584123.003.0001
A brief introduction to strongly correlated electronic materials

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This chapter summarizes the status of the very active field of research where the strength of the effective Coulombic repulsion among electrons is comparable to the bandwidth of the carriers. It focuses on complex transition-metal oxides, with emphasis on the manganese oxides known as manganites that display the so-called Colossal Magnetoresistance effect. It also describes several other materials such as high-temperature superconductors and multiferroics. In these correlated electron materials the interactions between the electronic spins, their charges and orbitals, and the lattice produce a rich variety of electronic phases and self-organization. The competition and/or cooperation among these correlated electron phases can lead to the emergence of surprising electronic phenomena and also of interesting functionalities via their nonlinear responses to external fields.

Keywords: strongly correlated electrons; colossal magnetoresistance effect; complex oxides; multiferroics; orbital order; double exchange; monte carlo simulations; Model Hamiltonians

Chapter.  14254 words.  Illustrated.

Subjects: Condensed Matter Physics

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