TY - JOUR
T1 - Attosecond chronoscopy of the photoemission near a bandgap of a single-element layered dielectric
AU - Potamianos, Dionysios
AU - Schnitzenbaumer, Maximilian
AU - Lemell, Christoph
AU - Scigalla, Pascal
AU - Libisch, Florian
AU - Schock-Schmidtke, Eckhard
AU - Haimerl, Michael
AU - Schröder, Christian
AU - Schäffer, Martin
AU - Küchle, Johannes T.
AU - Riemensberger, Johann
AU - Eberle, Karl
AU - Cui, Yang
AU - Kleineberg, Ulf
AU - Burgdörfer, Joachim
AU - Barth, Johannes V.
AU - Feulner, Peter
AU - Allegretti, Francesco
AU - Kienberger, Reinhard
N1 - Publisher Copyright:
copyright © 2024 the Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. no claim to original U.S. Government Works. distributed under a creative commons Attribution noncommercial license 4.0 (cc BY-nc).
PY - 2024/6
Y1 - 2024/6
N2 - We report on the energy dependence of the photoemission time delay from the single-element layered dielectric HOPG (highly oriented pyrolytic graphite). This system offers the unique opportunity to directly observe the Eisenbud-Wigner-Smith (EWS) time delays related to the bulk electronic band structure without being strongly perturbed by ubiquitous effects of transport, screening, and multiple scattering. We find the experimental streaking time shifts to be sensitive to the modulation of the density of states in the high-energy region (E ≈ 100 eV) of the band structure. The present attosecond chronoscopy experiments reveal an energy-dependent increase of the photoemission time delay when the final state energy of the excited electrons lies in the vicinity of the bandgap providing information difficult to access by conventional spectroscopy. Accompanying simulations further corroborate our interpretation.
AB - We report on the energy dependence of the photoemission time delay from the single-element layered dielectric HOPG (highly oriented pyrolytic graphite). This system offers the unique opportunity to directly observe the Eisenbud-Wigner-Smith (EWS) time delays related to the bulk electronic band structure without being strongly perturbed by ubiquitous effects of transport, screening, and multiple scattering. We find the experimental streaking time shifts to be sensitive to the modulation of the density of states in the high-energy region (E ≈ 100 eV) of the band structure. The present attosecond chronoscopy experiments reveal an energy-dependent increase of the photoemission time delay when the final state energy of the excited electrons lies in the vicinity of the bandgap providing information difficult to access by conventional spectroscopy. Accompanying simulations further corroborate our interpretation.
UR - http://www.scopus.com/inward/record.url?scp=85197178238&partnerID=8YFLogxK
U2 - 10.1126/sciadv.ado0073
DO - 10.1126/sciadv.ado0073
M3 - Article
C2 - 38924399
AN - SCOPUS:85197178238
SN - 2375-2548
VL - 10
JO - Science Advances
JF - Science Advances
IS - 26
M1 - eado0073
ER -