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  Ultrafast modification of the electronic structure of a correlated insulator

Grånäs, O., Vaskivskyi, I., Wang, X., Thunström, 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 (Publisher version), 3MB
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https://arxiv.org/abs/2008.11115 (Preprint)
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 Creators:
Grånäs, O.1, Author
Vaskivskyi, I.1, Author
Wang, X.1, Author
Thunström, P.1, Author
Ghimire, S.1, Author
Knut, R.1, Author
Söderström, J.1, Author
Kjellsson, L.1, Author
Turenne, D.1, Author
Engel, R. Y.1, Author
Beye, M.1, Author
Lu, J.1, Author
Higley, D. J.1, Author
Reid, A. H.1, Author
Schlotter, W.1, Author
Coslovich, G.1, Author
Hoffmann, M.1, Author
Kolesov, G.1, Author
Schüßler-Langeheine, C.1, Author
Styervoyedov, A.1, Author
Tancogne-Dejean, N.2, 3, Author           Sentef, M. A.3, 4, Author           Reis, D. A.1, AuthorRubio, A.2, 3, 5, Author           Parkin, S. S. P.1, AuthorKaris, O.1, AuthorRubensson, J.-E.1, AuthorEriksson, O.1, AuthorDürr, H. A.1, Author more..
Affiliations:
1external, ou_persistent22              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
3Center for Free-Electron Laser Science, ou_persistent22              
4Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
5Center for Computational Quantum Physics, Flatiron Institute, ou_persistent22              

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 Abstract: 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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Language(s): eng - English
 Dates: 2022-06-222021-12-282022-06-272022-08-16
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevResearch.4.L032030
arXiv: 2008.11115
 Degree: -

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Project name : We acknowledge funding by the Deutsche Forschungsgemeinschaft (DFG) under Ger- many’s Excellence Strategy - Cluster of Excellence Advanced Imaging of Matter (AIM) EXC 2056 - 390715994 and funding by the Deutsche Forschungsgemeinschaft (DFG).
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Title: Physical Review Research
Source Genre: Journal
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Publ. Info: College Park, Maryland, United States : American Physical Society (APS)
Pages: - Volume / Issue: 4 (3) Sequence Number: L032030 Start / End Page: - Identifier: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564