Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 3 September 1993:
Vol. 261. no. 5126, pp. 1307 - 1310
DOI: 10.1126/science.261.5126.1307
Prev | Table of Contents | Next

Articles

Lattice Effect of Strong Electron Correlation: Implication for Ferroelectricity and Superconductivity

T. Egami 1, S. Ishihara 1, and M. Tachiki 1

1 Institute for Materials Research, Tohoku University, Sendai 980, Japan

Much theoretical work has been devoted to understanding the role of strong electron correlations in high-temperature superconductivity mainly through magnetic interactions, but the possible role of electron correlation in ferroelectricity of metal oxides has not received attention. Diagonalization of a simple many-body, tight-binding Hamiltonian shows that the electron-lattice interaction is dramatically enhanced in some cases by strong electron correlation because of deformation-induced charge transfer. This effect may be closely related to ferroelectricity and superconductivity in transition metal oxides.

Submitted on May 20, 1993
Accepted on July 28, 1993

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)