Infrared and electronic Raman response of coexisting d-wave density wave and d-wave superconductivity

Abstract

We present mean-field calculations for the in-plane optical conductivity, the superfluid density, and the electronic Raman susceptibility in quasi two-dimensional systems possessing a ground state with two competing order parameters: d-wave density wave (dDW) and d-wave superconductor (dSC). In the coexisting dDW+dSC phase we calculate the frequency dependence of these correlation functions in the presence of impurity scattering in the unitary limit, relevant to zinc-doped cuprate superconductors.

Raman scattering study of spin-density-wave order and electron-phonon coupling in Ba(Fe1−xCox)Chauviere1, Gallais2, Cazayous3 et al. 2011Phys. Rev. B4913910View full textAdd to dashboardCite

“…As it is not the case 28,29 , the Fermi surface is partially gapped and the SDW gap is strongly anisotropic. The imperfect nest- 32,33 . For simplicity constant Raman vertices along the hole and electron Fermi surfaces and a small phenomenological broadening γ = 0.05∆SDW were taken.…”

“…The imperfect nest-0 2 0 0 4 0 0 6 0 0 8 0 0 1 0 0 0 1 2 0 0 1 4 0 0 1 6 0 0 5: a) Low temperature Raman response, compared to the high temperature one, in the (x'y') configuration for the parent compound Ba-122 showing two spectral features at ∆SDW and ∆ SDW . Insert : anti-crossing of a hole and an electron band inducing the opening of a SDW gap ∆SDW and associated Raman response calculated in the case of perfect nesting 32,33 . For simplicity constant Raman vertices along the hole and electron Fermi surfaces and a small phenomenological broadening γ = 0.05∆SDW were taken.…”