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Título: | Angular momentum–induced delays in solid-state photoemission enhanced by intra-atomic interactions |
Autor: | Siek, Fabian; Neb, Sergej; Bartz, Peter; Hensen, Matthias; Strüber, Christian; Fiechter, Sebastian; Torrent-Sucarrat, Miquel CSIC ORCID; Silkin, Viatcheslav M. CSIC ORCID; Krasovskii, E. E.; Kabachnik, Nikolay M.; Fritzsche, Stephan; Díez Muiño, Ricardo CSIC ORCID ; Echenique, Pedro M. CSIC ORCID; Kazansky, Andrey K. CSIC; Müller, Norbert; Pfeiffer, Walter; Heinzmann, Ulrich | Fecha de publicación: | 2017 | Editor: | American Association for the Advancement of Science | Citación: | Science 357(6357): 1274-1277 (2017) | Resumen: | Attosecond time-resolved photoemission spectroscopy reveals that photoemission from solids is not yet fully understood. The relative emission delays between four photoemission channels measured for the van der Waals crystal tungsten diselenide (WSe) can only be explained by accounting for both propagation and intra-atomic delays. The intra-atomic delay depends on the angular momentum of the initial localized state and is determined by intra-atomic interactions. For the studied case of WSe, the photoemission events are time ordered with rising initial-state angular momentum. Including intra-atomic electron-electron interaction and angular momentum of the initial localized state yields excellent agreement between theory and experiment. This has required a revision of existing models for solid-state photoemission, and thus, attosecond time-resolved photoemission from solids provides important benchmarks for improved future photoemission models. | Versión del editor: | https://doi.org/10.1126/science.aam9598 | URI: | http://hdl.handle.net/10261/176377 | DOI: | 10.1126/science.aam9598 | Identificadores: | doi: 10.1126/science.aam9598 e-issn: 1095-9203 issn: 0036-8075 |
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