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  Ultrafast modification of the electronic structure of a correlated insulator

Grånäs, O., Vaskivskyi, I., Wang, X., Thunstroem, P., Ghimire, S., Knut, R., et al. (2022). Ultrafast modification of the electronic structure of a correlated insulator. Physical Review Research, 4(3): L032030. doi:10.1103/PhysRevResearch.4.L032030.

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PhysRevResearch.4.L032030.pdf (Verlagsversion), 3MB
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PhysRevResearch.4.L032030.pdf
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2022
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The Author(s). Published by the American Physical Society.

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https://doi.org/10.1103/PhysRevResearch.4.L032030 (Verlagsversion)
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 Urheber:
Grånäs, O.1, Autor
Vaskivskyi, I.1, Autor
Wang, X.1, Autor
Thunstroem, P.1, Autor
Ghimire, S.1, Autor
Knut, R.1, Autor
Söderström, J.1, Autor
Kjellsson, L.1, Autor
Turenne, D.1, Autor
Engel, R. Y.1, Autor
Beye, M.1, Autor
Lu, J.1, Autor
Higley, D. J.1, Autor
Reid, A. H.1, Autor
Schlotter, W.1, Autor
Coslovich, G.1, Autor
Hoffmann, M.1, Autor
Kolesov, G.1, Autor
Schüßler-Langeheine, C.1, Autor
Styervoyedov, A.2, Autor           
Tancogne-Dejean, N.1, AutorSentef, M. A.1, AutorReis, D. A.1, AutorRubio, A.1, AutorParkin, S. S. P.2, Autor                 Karis, O.1, AutorRubensson, J. -e.1, AutorEriksson, O.1, AutorDürr, H. A.1, Autor mehr..
Affiliations:
1external, ou_persistent22              
2Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, ou_3287476              

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 Zusammenfassung: A nontrivial balance between Coulomb repulsion and kinematic effects determines the electronic structure of correlated electron materials. The use of electromagnetic fields strong enough to rival these native microscopic interactions allows us to study the electronic response as well as the time scales and energies involved in using quantum effects for possible applications. We use element-specific transient x-ray absorption spectroscopy and high-harmonic generation to measure the response to ultrashort off-resonant optical fields in the prototypical correlated electron insulator NiO. Surprisingly, fields of up to 0.22 V/Å lead to no detectable changes in the correlated Ni 3d orbitals contrary to previous predictions. A transient directional charge transfer is uncovered, a behavior that is captured by first-principles theory. Our results highlight the importance of retardation effects in electronic screening and pinpoints a key challenge in functionalizing correlated materials for ultrafast device operation.

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 Datum: 2022-08-222022-08
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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Titel: Physical Review Research
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: College Park, Maryland, United States : American Physical Society (APS)
Seiten: - Band / Heft: 4 (3) Artikelnummer: L032030 Start- / Endseite: - Identifikator: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564