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• Short review of previous TR-ARPES works on cuprates. • Discussion of the information encoded in the transient photoemission intensity. • Study of the nodal coherent spectral weight in Bi-based cuprates: key role played by the Fermi-Liquid self-energy. • Filling of the superconducting gap via non-thermal quenching of the phase coherence in Bibased cuprates. • Outlook. The pursuit of a comprehensive understanding of the dynamical nature of intertwined orders in quantum matter has fueled the development of several new experimental techniques, including time- and angle-resolved photoemission spectroscopy (TR-ARPES). In this regard, the study of copper-oxide high-temperature superconductors, prototypical quantum materials, has furthered both the technical advancement of the experimental technique, as well as the understanding of their correlated dynamical properties. Here, we provide a brief historical overview of the TR-ARPES investigations of cuprates, and review what specific information can be accessed via this approach. We then present a detailed discussion of the transient evolution of the low-energy spectral function both along the gapless nodal direction and in the near-nodal superconducting gap region, as probed by TR-ARPES on Bi-based cuprates. [ABSTRACT FROM AUTHOR]

We report a photoemission and x-ray absorption study on a Au1-xPtxTe2 (x = 0 and 0.35) triangular lattice in which superconductivity is induced by Pt substitution for Au. Au 4 f and Te 3d core-level spectra of AuTe2 suggest a valence state of Au2+(Te2)2- which is consistent with its distorted crystal structure with Te-Te dimers and compressed AuTe6 octahedra. On the other hand, valence-band photoemission spectra and preedge peaks of the Te 3d absorption edge indicate that Au 5d bands are almost fully occupied and that Te 5p holes govern the transport properties and the lattice distortion. The two apparently conflicting pictures can be reconciled by strong Au 5d/Au 6s-Te 5p hybridization. The absence of a core-level energy shift with Pt substitution is inconsistent with the simple rigid band picture for hole doping. The Au 4 f core-level spectrum gets slightly narrow with Pt substitution, indicating that the small Au 5d charge modulation in distorted AuTe2 is partially suppressed. [ABSTRACT FROM AUTHOR]