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Journal Article

Ubiquitous suppression of the nodal coherent spectral weight in Bi-based cuprates


Michiardi,  M.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zonno, M., Boschini, F., Razzoli, E., Dufresne, S., Michiardi, M., Na, M. X., et al. (2021). Ubiquitous suppression of the nodal coherent spectral weight in Bi-based cuprates. Physical Review B, 103(15): 155109, pp. 1-9. doi:10.1103/PhysRevB.103.155109.

Cite as: http://hdl.handle.net/21.11116/0000-0008-7D04-8
High-temperature superconducting cuprates exhibit an intriguing phenomenology for the low-energy elementary excitations. In particular, an unconventional temperature dependence of the coherent spectral weight (CSW) has been observed in the superconducting phase by angle-resolved photoemission spectroscopy (ARPES), both at the antinode where the d-wave paring gap is maximum, as well as along the gapless nodal direction. Here, we combine equilibrium and time-resolved ARPES to track the temperature-dependent meltdown of the nodal CSW in Bi-based cuprates with unprecedented sensitivity. We find the nodal suppression of CSW upon increasing temperature to be ubiquitous across single- and bi-layer Bi cuprates, and uncorrelated to superconducting and pseudogap onset temperatures. We quantitatively model both the lineshape of the nodal spectral features and the anomalous suppression of CSW within the Fermi-liquid framework, establishing the key role played by the normal state electrodynamics in the description of nodal quasiparticles in superconducting cuprates. © 2021 American Physical Society.