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  Ultrafast modification of the electronic structure of a correlated insulator

Grånäs, O., Vaskivskyi, I., Thunström, P., Ghimire, S., Knut, R., Söderström, J., et al. (2021). Ultrafast modification of the electronic structure of a correlated insulator.

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2008.11115.pdf (Preprint), 6MB
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https://arxiv.org/abs/2008.11115 (Preprint)
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 Creators:
Grånäs, O.1, Author
Vaskivskyi, I.1, 2, Author
Thunström, P.1, Author
Ghimire, S.3, Author
Knut, R.1, Author
Söderström, J.1, Author
Kjellsson, L.1, Author
Turenne, D.1, Author
Engel, R. Y.4, Author
Beye, M.4, Author
Lu, J.3, Author
Reid, A. H.5, Author
Schlotter, W.5, Author
Coslovich, G.5, Author
Hoffmann, M.5, Author
Kolesov, G.6, Author
Schüßler-Langeheine, C.7, Author
Styervoyedov, A.8, Author
Tancogne-Dejean, N.9, 10, Author              
Sentef, M. A.10, 11, Author              
Reis, D. A.3, AuthorRubio, A.9, 10, 12, Author              Parkin, S. S. P.8, AuthorKaris, O.1, AuthorNordgren, J.1, AuthorRubensson, J.-E.1, AuthorEriksson, O.1, 13, AuthorDürr, H. A.1, Author more..
Affiliations:
1Department of Physics and Astronomy, Uppsala University, ou_persistent22              
2Center for Memory and Recording Research, University of California San Diego, ou_persistent22              
3Stanford PULSE Institute, SLAC National Accelerator Laboratory, ou_persistent22              
4Department of Photon Science, DESY, ou_persistent22              
5SLAC National Accelerator Laboratory, ou_persistent22              
6John Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, ou_persistent22              
7Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, ou_persistent22              
8Max-Planck Institut für Mikrostrukturphysik, ou_persistent22              
9Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
10Center for Free-Electron Laser Science, ou_persistent22              
11Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
12Center for Computational Quantum Physics, Flatiron Institute, New York, ou_persistent22              
13School of Science and Technology, Örebro University, ou_persistent22              

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 Abstract: Electronic materials properties are determined by the interplay of many competing factors. Electro-magnetic fields strong enough to rival atomic interactions can disturb the balance between kinematic effects due to electrons hopping between lattice sites and the Coulomb repulsion between electrons that limits the band formation. This allows for new insights into quantum phases, as well as the time-scales and energies involved in using quantum effects for possible applications. Here we show that 0.2 V/Å ultrashort optical fields in the high harmonic generation regime lead to a pronounced transient inter-site charge transfer in NiO, a prototypical correlated electron insulator. Element-specific transient x-ray absorption spectroscopy detects a negligible change in electron correlations of Ni 3d-states. This behaviour is captured by time-dependent density functional theory and points to a speed limit for the dynamical screening of the Coulomb interaction taking place above our experimental 6.9 femtoseconds optical cycle.

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Language(s): eng - English
 Dates: 2021-12-26
 Publication Status: Published online
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: arXiv: 2008.11115
 Degree: -

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