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

Abstract

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.

latex, 4 pages, 3 postscript figures

References in corpus (2)

• Quasiparticles in the superconducting state of Bi2Sr2CaCu2O8
• On the electron-energy loss spectra and plasmon resonance in cuprates

Cited by in corpus (2)

• Powerlaw optical conductivity with a constant phase angle in high Tc superconductors
• Resistivity and optical conductivity of cuprates within the t-J model