On the Relation between Optical Conductivity and Quasiparticle Dynamics: Boson Structures

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dc.creatorCarbotte, J. P.
dc.creatorSchachinger, E.
dc.creatorHwang, J.
dc.date2004-12-06
dc.date2004-12-16
dc.date.accessioned2026-07-07T03:02:31Z
dc.date.available2026-07-07T03:02:31Z
dc.descriptionAn extended Drude form is often used to analyze optical data in terms of an optical scattering rate and renormalized mass corresponding, respectively, to the real and imaginary part of the memory function. We study the relationship between memory function and quasiparticle self energy for an isotropic system. We emphasize particularly boson signatures. We find it useful to introduce a new auxiliary model scattering rate and its Kramers-Kronig transform determined solely from optics which are much closer to the self energy than is the memory function itself in the normal state. In the superconducting state the simplification fails because the quasiparticle density of states acquires an essential energy dependence.
dc.description13 Pages, 6 Figures accepted for publication by Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0412118
dc.identifierhttp://arxiv.org/abs/cond-mat/0412118
dc.identifierPhys. Rev. B, Vol. 71, 054506 (2005)
dc.identifierdoi:10.1103/PhysRevB.71.054506
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25420
dc.subjectSuperconductivity
dc.titleOn the Relation between Optical Conductivity and Quasiparticle Dynamics: Boson Structures
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