Role of bosonic modes in the mechanism of high temperature Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ superconductors using ultrafast optical techniques

Jian-Xin Zhu, Elbert E. M. Chia, T. Tamegai +4

Using ultrafast optical techniques, we probe the hole-doping dependence of the electron-boson coupling constant $\lambda$ in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$. In the overdoped region,…