Special Reviews

Orbital Physics in Transition-Metal Oxides

See allHide authors and affiliations

Science  21 Apr 2000:
Vol. 288, Issue 5465, pp. 462-468
DOI: 10.1126/science.288.5465.462

You are currently viewing the abstract.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution

Abstract

An electron in a solid, that is, bound to or nearly localized on the specific atomic site, has three attributes: charge, spin, and orbital. The orbital represents the shape of the electron cloud in solid. In transition-metal oxides with anisotropic-shaped d-orbital electrons, the Coulomb interaction between the electrons (strong electron correlation effect) is of importance for understanding their metal-insulator transitions and properties such as high-temperature superconductivity and colossal magnetoresistance. The orbital degree of freedom occasionally plays an important role in these phenomena, and its correlation and/or order-disorder transition causes a variety of phenomena through strong coupling with charge, spin, and lattice dynamics. An overview is given here on this “orbital physics,” which will be a key concept for the science and technology of correlated electrons.

View Full Text