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  All-optical nonequilibrium pathway to stabilising magnetic Weyl semimetals in pyrochlore iridates

Topp, G., Tancogne-Dejean, N., Kemper, A. F., Rubio, A., & Sentef, M. A. (2018). All-optical nonequilibrium pathway to stabilising magnetic Weyl semimetals in pyrochlore iridates. Nature Communications, 9: 4452. doi:10.1038/s41467-018-06991-8.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0002-44FC-6 Versions-Permalink: https://hdl.handle.net/21.11116/0000-0004-B7DD-5
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This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
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https://arxiv.org/abs/1803.07447 (Preprint)
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 Urheber:
Topp, G.1, 2, Autor           
Tancogne-Dejean, N.1, 3, Autor           
Kemper, A. F.4, Autor
Rubio, A.3, 5, Autor           
Sentef, M. A.1, 2, Autor           
Affiliations:
1Center for Free Electron Laser Science, ou_persistent22              
2Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
3Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
4Department of Physics, North Carolina State University, ou_persistent22              
5Center for Computational Quantum Physics (CCQ), Flatiron Institute, ou_persistent22              

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 Zusammenfassung: Nonequilibrium many-body dynamics is becoming one of the central topics of modern condensed matter physics. Floquet topological states were suggested to emerge in photodressed band structures in the presence of periodic laser driving. Here we propose a viable nonequilibrium route without requiring coherent Floquet states to reach the elusive magnetic Weyl semimetallic phase in pyrochlore iridates by ultrafast modification of the effective electron-electron interaction with short laser pulses. Combining \textit{ab initio} calculations for a time-dependent self-consistent reduced Hubbard U controlled by laser intensity and nonequilibrium magnetism simulations for quantum quenches, we find dynamically modified magnetic order giving rise to transiently emerging Weyl cones that are probed by time- and angle-resolved photoemission spectroscopy. Our work offers a unique and realistic pathway for nonequilibrium materials engineering beyond Floquet physics to create and sustain Weyl semimetals. This may lead to ultrafast, tens-of-femtoseconds switching protocols for light-engineered Berry curvature in combination with ultrafast magnetism.

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Sprache(n): eng - English
 Datum: 2018-03-272018-10-092018-10-26
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: arXiv: 1803.07447
DOI: 10.1038/s41467-018-06991-8
 Art des Abschluß: -

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Projektname : We thank C. Timm for suggesting the pyrochlore iridates as a candidate class of materials to light-induced nontrivial topology beyond Floquet states. Discussions with A. de la Torre and D. Kennes are gratefully acknowledged. G.E.T. and M.A.S. acknowledge financial support by the DFG through the Emmy Noether programme (SE 2558/2-1). A.R. and N.T.-D. acknowledge financial support by the European Research Council (ERC-2015-AdG-694097) and European Union’s H2020 programme under GA no. 676580 (NOMAD).
Grant ID : 676580
Förderprogramm : Horizon 2020 (H2020)
Förderorganisation : European Commission (EC)

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Titel: Nature Communications
  Kurztitel : Nat. Commun.
Genre der Quelle: Zeitschrift
 Urheber:
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Ort, Verlag, Ausgabe: London : Nature Publishing Group
Seiten: - Band / Heft: 9 Artikelnummer: 4452 Start- / Endseite: - Identifikator: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723