RT Journal Article
T1 Disentangling photodoping, photoconductivity, and photosuperconductivity in the cuprates
A1 El Hage, R.
A1 Sánchez Manzano, David
A1 Humbert, V.
A1 Carreira, S.
A1 Rouco Gómez, Víctor
A1 Sander, A.
A1 Cuéllar Jiménez, Fabian Andrés
A1 Seurre, K.
A1 Lagarrigue, 
A1 S. Mesoraca, A.
A1 Briatico, J.
A1 Trastoy, J.
A1 Santamaría Sánchez-Barriga, Jacobo
A1 Villegas, J. E.
AB The normal-state conductivity and superconducting critical temperature of oxygen-deficient YBa2Cu3O7-delta can be persistently enhanced by illumination. Strongly debated for years, the origin of those effects-termed persistent photoconductivity and photosuperconductivity (PPS)-has remained an unsolved critical problem, whose comprehension may provide key insights to harness the origin of hightemperature superconductivity itself. Here, we make essential steps toward understanding PPS. While the models proposed so far assume that it is caused by a carrier-density increase (photodoping) observed concomitantly, our experiments contradict such conventional belief: we demonstrate that it is instead linked to a photo-induced decrease of the electronic scattering rate. Furthermore, we find that the latter effect and photodoping are completely disconnected and originate from different microscopic mechanisms, since they present different wavelength and oxygen-content dependences as well as strikingly different relaxation dynamics. Besides helping disentangle photodoping, persistent photoconductivity, and PPS, our results provide new evidence for the intimate relation between critical temperature and scattering rate, a key ingredient in modern theories on high-temperature superconductivity.
PB American Physical Society
SN 0031-9007
YR 2024
FD 2024-02-05
LK https://hdl.handle.net/20.500.14352/105818
UL https://hdl.handle.net/20.500.14352/105818
LA eng
NO R. El Hage et al., Disentangling Photodoping, Photoconductivity, and Photosuperconductivity in the Cuprates, Phys. Rev. Lett. 132, 066001 (2024).
NO European Research Council
NO European Commission
NO Agence Natonale de la Recherche (France)
NO Comunidad de Madrid
NO Agencia Estatal de Investigación (España)
NO Ministerio de Ciencia e Innovación (España)
DS Docta Complutense
RD 30 sept 2024