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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:. doi:10.1038/s41467-018-06991-8.

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アイテムのパーマリンク: https://hdl.handle.net/21.11116/0000-0005-DF86-9 版のパーマリンク: https://hdl.handle.net/21.11116/0000-0007-0D3F-6
資料種別: 学術論文

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s41467-018-06991-8.pdf (出版社版), 3MB
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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 willneed to obtain permission directly from the copyright holder.
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URL:
https://arxiv.org/abs/1803.07447 (プレプリント)
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 作成者:
Topp, G.1, 2, 3, 著者           
Tancogne-Dejean, N.2, 4, 著者
Kemper, A. F.5, 著者
Rubio, A.3, 6, 著者
Sentef, M. A.2, 3, 著者
所属:
1International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266714              
2Center for Free Electron Laser Science, ou_persistent22              
3Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_persistent22              
4Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_persistent22              
5Department of Physics, North Carolina State University, ou_persistent22              
6Center for Computational Quantum Physics (CCQ), Flatiron Institute, ou_persistent22              

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 要旨: 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.

資料詳細

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言語: eng - English
 日付: 2018-03-272018-10-092018-10-26
 出版の状態: オンラインで出版済み
 ページ: -
 出版情報: -
 目次: -
 査読: 査読あり
 識別子（DOI, ISBNなど）: arXiv: 1803.07447
DOI: 10.1038/s41467-018-06991-8
 学位: -

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Project information

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Project name : 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
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

出版物 1

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出版物名: Nature Communications
  省略形 : Nat. Commun.
種別: 学術雑誌
 著者・編者:
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出版社, 出版地: London : Nature Publishing Group
ページ: - 巻号: 9 通巻号: 4452 開始・終了ページ: - 識別子（ISBN, ISSN, DOIなど）: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723