Signatures of superconductivity and pseudogap formation in non-equilibrium nodal quasiparticles revealed by ultrafast angle-resolved photoemission

Wentao Zhang, Christopher L. Smallwood, Chris Jozwiak +5

We use time- and angle-resolved photoemission to measure the nodal non-equilibrium electronic states in various dopings of Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$. We find that the initial p…