Influence of incommensurate dynamic charge-density wave scattering on the line shape of high-T${}_c$ cuprates

Abstract

We show that the spectral lineshape of superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$ (LSCO) and Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ (Bi2212) can be well described by the coupling of the charge carriers to collective incommensurate charge-density wave (CDW) excitations. Our results imply that besides antiferromagnetic (AF) fluctuations also low-energy CDW modes can contribute to the observed dip-hump structure in the Bi2212 photoemission spectra. In case of underdoped LSCO we propose a possible interpretation of ARPES data in terms of a grid pattern of fluctuating stripes where the charge and spin scattering directions deviate by $\alpha =\pi /4$. Within this scenario we find that the spectral intensity along $(0,0)\to (\pi ,\pi )$ is strongly suppressed consistent with recent photoemission experiments. In addition the incommensurate charge-density wave scattering leads to a significant broadening of the quasiparticle-peak around $(\pi ,0)$.

5 pages, 4 figures

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• Interpretation of low-temperature nuclear quadrupole resonance spectra in La(1.875)Ba(0.125)CuO(4) in terms of two-dimensional spin superstructure
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