Sum rule for the optical scattering rates

Abstract

An important quantity in electronic systems is the quasiparticle scattering rate (QPSR). A related optical scattering rate (OSR) is routinely extracted from optical data, and, while it is not the same as the QPSR, it nevertheless displays many of the same features. We consider a sum rule which applies to the area under a closely related quantity, almost equal to the OSR in the low energy region. We focus on the readjustment caused by, for example, a quasiparticle density of states change due to the superconducting transition. Unfortunately, no general statement about mechanism can be made solely on the energy scale in which the spectral weight readjustment on the OSR occurs.

22 pages, 7 figures accepted for publication by Phys. Rev. B

References in corpus (1)

• Magnetic resonance at 41 meV and charge dynamics in YBa_2Cu_3O_6.95

Cited by in corpus (9)

• Charge carrier interaction with a purely electronic collective mode: Plasmarons and the infrared response of elemental bismuth
• Correlation gap in the heavy-fermion antiferromagnet UPd_2Al_3
• Optical self-energy of superconducting Pb in the THz region
• The differential sum rule for the relaxation rate in dirty superconductors
• Optical properties of the iron-chalcogenide superconductor FeTe0.55Se0.45
• The differential sum rule for the relaxation rate in the cuprates
• In-plane optical features of the underdoped La_2CuO_4 based compounds: theoretical multiband analysis
• Electrodynamics of correlated electron systems
• Changes in Optical Conductivity due to Readjustments in Electronic Density of States