Origin of the high-energy kink or the waterfall effect in the photoemission spectrum of the $\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{r}}_2\mathrm{CaC}{\mathrm{u}}_2{\mathrm{O}}_8$ high-temperature superconductor

Susmita Basak, Tanmoy Das, Hsin Lin +4

The high-energy kink or the waterfall effect seen in the photoemission spectra of the cuprates is suggestive of the coupling of the quasiparticles to a high energy bosonic mode wit…