Doping Dependence of the Redistribution of Optical Spectral Weight in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$

F. Carbone, A. B. Kuzmenko, H. J. A. Molegraaf +10

We present the ab-plane optical conductivity of four single crystals of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ (Bi2212) with different carrier doping levels from the strongly underdop…