Impurity effects on optical response in a finite band electronic system coupled to phonons

Abstract

The concepts, which have traditionally been useful in understanding the effects of the electron--phonon interaction in optical spectroscopy, are based on insights obtained within the infinite electronic band approximation and no longer apply in finite band metals. Impurity and phonon contributions to electron scattering are not additive and the apparent strength of the coupling to the phonon degrees of freedom is substantially reduced with increased elastic scattering. The optical mass renormalization changes sign with increasing frequency and the optical scattering rate never reaches its high frequency quasiparticle value which itself is also reduced below its infinite band value.

References in corpus (2)

• On the Relation between Optical Conductivity and Quasiparticle Dynamics: Boson Structures
• Observation of phonon structure in electron density of states of normal metal

Cited by in corpus (9)

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• Optical Sum Rule in Finite Bands
• Fermi surface arcs and the infrared conductivity of underdoped YBa${}_2$Cu${}_3$O${}_{6.50}$
• Intraband Optical Spectral Weight in the presence of a van Hove singularity: application to Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Manifestation of pseudogap in ab-plane optical characteristics
• Impact of a finite cut-off for the optical sum rule in the superconducting state
• Temperature Dependence of the Conductivity Sum Rule in the Normal State due to Inelastic Scattering
• Optical Sum Rule anomalies in the High-Tc Cuprates