| Issue |
Europhys. Lett.
Volume 53, Number 2, January 2001
|
|
|---|---|---|
| Page(s) | 228 - 232 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00141-0 | |
| 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
Received:
24
July
2000
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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