Volume 53, Number 2, January 2001
|Page(s)||228 - 232|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 December 2003|
On the universal optical conductivity and single-particle relaxation in cuprates
Institute for Solid State Physics, University
of Tokyo Kashiwanoha, Kashiwa-shi, Chiba 277-8581, Japan
and Faculty of Mathematics and Physics, University of
Ljubljana and J. Stefan Institute - 1000 Ljubljana, Slovenia
Accepted: 13 November 2000
The origin of the universal optical conductivity form , representing well the results of numerical model studies of doped antiferromagnets and also experiments on cuprates near optimal doping, is considered. We argue that such a behaviour appears quite generally when the single-particle excitations are overdamped and their relaxation follows the marginal Fermi-liquid concept. The relation to recent ARPES experiments is also discussed.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 72.10.-d – Theory of electronic transport; scattering mechanisms / 74.72.-h – High-Tc compounds
© EDP Sciences, 2001
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