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

Faculty of Mathematics; Japan; J. Stefan Institute; Ljubljana; Peter Prelovsek (Institute for Materials Research; Physics; Sendai; Slovenia); Tohoku University; University of Ljubljana

arxiv: cond-mat/0005330 · v2 · submitted 2000-05-19 · ❄️ cond-mat.str-el

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

Peter Prelovsek (Institute for Materials Research , Tohoku University , Sendai , Japan , Faculty of Mathematics , Physics , University of Ljubljana , J. Stefan Institute

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Ljubljana Slovenia)

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keywords omegaconductivitycupratesdiscussedexperimentsopticalrelaxationsingle-particle

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

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