Doping dependence of the electron-phonon and electron-spin fluctuation interactions in the high-$T_c$ superconductor Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$

Elbert E. M. Chia, D. Springer, Saritha K. Nair +9

Using ultrafast optical techniques, we detect two types of bosons strongly coupled to electrons in the family of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ from the underdoped to overdope…