A long-standing puzzle in the quantum critical behavior of cuprate superconductors has been the observed sub-linear power-law dependence of optical conductivity. Here, the authors present measurements of the optical spectra and resistivity of La2−xSrxCuO4, and develop a theoretical framework that yields a unified description of the optical spectra, resistivity and specific heat.
- Bastien Michon
- Christophe Berthod
- Antoine Georges
