On the universal optical conductivity and single-particle relaxation in cuprates

Details On the universal optical conductivity and single-particle relaxation in cuprates On the universal optical conductivity and single-particle relaxation in cuprates

2000-05-19

arxiv.org/abs/cond-mat/0005330v2

Physics

Condensed Matter

Strongly Correlated Electrons

latex, 4 pages, 3 postscript figures

Scientific paper

10.1209/epl/i2001-00141-0

The origin of the universal optical conductivity form sigma(omega) ~ (1-e^(omega/T))/omega established in numerical model studies of doped antiferromagnets and consistent with experiments on cuprates near optimal doping is discussed. It is shown that such a behaviour appears quite generally when the single-particle excitations are overdamped and their relaxation follows the marginal Fermi liquid concept. Relation to recent ARPES experiments is also discussed.

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