Physics – Condensed Matter – Superconductivity
Scientific paper
2009-04-15
New J. Phys. 11 (2009) 055067.
Physics
Condensed Matter
Superconductivity
20 pages, 9 figures. To appear in special focus issue "Superconductors with Exotic Symmetries", New Journal of Physics
Scientific paper
10.1088/1367-2630/11/5/055067
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.
der Marel Dirk van
Eisaki Hiroshi
Heumen Erik van
Kuzmenko Alexey B.
Meevasana W.
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