Signatures of superconductivity and pseudogap formation in non-equilibrium nodal quasiparticles revealed by ultrafast angle-resolved photoemission
Abstract
We use time- and angle-resolved photoemission to measure the nodal non-equilibrium electronic states in various dopings of Bi2Sr2CaCu2O8+δ. We find that the initial pump-induced transient signal of these ungapped states is strongly affected by the onset of the superconducting gap at Tc, superconducting pairing fluctuations at Tp, and the pseudogap at T*. Moreover, Tp marks a suggestive threshold in the fluence-dependent transient signal, with the appearance of a critical fluence below Tp that corresponds to the energy required to break apart all Cooper pairs. These results challenge the notion of a nodal-antinodal dichotomy in cuprate superconductors by establishing a new link between nodal quasiparticles and the cuprate phase diagram.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.