Doping dependent optical properties of Bi2201

Abstract

An experimental study of the in-plane optical conductivity of (Pb${}_x$,Bi${}_{2-x}$)(La${}_y$Sr${}_{2-y}$)CuO${}_{6+\delta }$ (Bi2201) is presented for a broad doping and temperature range. The in-plane conductivity is analyzed within a strong coupling formalism. We address the interrelationship between the optical conductivity ($\sigma (\omega )$), the single particle self energy, and the electron-boson spectral function. We find that the frequency and temperature dependence can be well described within this formalism. We present a universal description of optical, ARPES and tunneling spectra. The full frequency and temperature dependence of the optical spectra and single particle self-energy is shown to result from an electron-boson spectral function, which shows a strong doping dependence and weak temperature dependence.

20 pages, 9 figures. To appear in special focus issue "Superconductors with Exotic Symmetries", New Journal of Physics

References in corpus (3)

• "Waterfalls" phenomenon in superconducting cuprates
• "Waterfalls" in cuprates
• Optics clues to pairing glues in high T${}_c$ cuprates