2026-06-08T07:23:34Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/1058182025-03-18T12:58:22Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc El Hage, Ralph author Sánchez Manzano, David author Humbert, Vincent author Carreira, Santiago author Rouco Gómez, Víctor author Sander, Anke author Cuéllar Jiménez, Fabian Andrés author Seurre, Kevin author Lagarrigue, Aurelien author Mesoraca, Salvatore author Briatico, Javier author Trastoy, Juan author Santamaría Sánchez-Barriga, Jacobo author Villegas, Javier author 2024 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. R. El Hage et al., Disentangling Photodoping, Photoconductivity, and Photosuperconductivity in the Cuprates, Phys. Rev. Lett. 132, 066001 (2024). 0031-9007 10.1103/PhysRevLett.132.066001 https://hdl.handle.net/20.500.14352/105818 1079-7114 https://doi.org/10.1103/PhysRevLett.132.066001 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.132.066001 https://arxiv.org/abs/2310.02761 Disentangling photodoping, photoconductivity, and photosuperconductivity in the cuprates