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  Nonlinear optical diode effect in a magnetic Weyl semimetal

Tzschaschel, C., Qiu, J.-X., Gao, X.-J., Li, H.-C., Guo, C., Yang, H.-Y., et al. (2024). Nonlinear optical diode effect in a magnetic Weyl semimetal. Nature Communications, 15(1): 3017. doi:10.1038/s41467-024-47291-8.

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 Creators:
Tzschaschel, C.1, Author
Qiu, J.-X.1, Author
Gao, X.-J.1, Author
Li, H.-C.1, Author
Guo, C.2, 3, Author           
Yang, H.-Y.1, Author
Zhang, C.-P.1, Author
Xie, Y.-M.1, Author
Liu, Y.-F.1, Author
Gao, A.1, Author
Bérubé, D.1, Author
Dinh, T.1, Author
Ho, S.-C.1, Author
Fang, Y.1, Author
Huang, F.1, Author
Nordlander, J.1, Author
Ma, Q.1, Author
Tafti, F.1, Author
Moll, P. J. W.2, 3, Author           
Law, K. T.1, Author
Xu, S.-Y.1, Author more..
Affiliations:
1external, ou_persistent22              
2Microstructured Quantum Matter Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3336858              
3Laboratory of Quantum Materials (QMAT), Institute of Materials (IMX), École Polytechnique Fédérale de Lausanne (EPFL), ou_persistent22              

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 Abstract: Diode effects are of great interest for both fundamental physics and modern technologies. Electrical diode effects (nonreciprocal transport) have been observed in Weyl systems. Optical diode effects arising from the Weyl fermions have been theoretically considered but not probed experimentally. Here, we report the observation of a nonlinear optical diode effect (NODE) in the magnetic Weyl semimetal CeAlSi, where the magnetization introduces a pronounced directionality in the nonlinear optical second-harmonic generation (SHG). We demonstrate a six-fold change of the measured SHG intensity between opposite propagation directions over a bandwidth exceeding 250 meV. Supported by density-functional theory, we establish the linearly dispersive bands emerging from Weyl nodes as the origin of this broadband effect. We further demonstrate current-induced magnetization switching and thus electrical control of the NODE. Our results advance ongoing research to identify novel nonlinear optical/transport phenomena in magnetic topological materials and further opens new pathways for the unidirectional manipulation of light.

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Language(s): eng - English
 Dates: 2023-07-192024-03-272024-04-08
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2307.15603
DOI: 10.1038/s41467-024-47291-8
 Degree: -

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Grant ID : 715730
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : Work in the SYX group was partly supported through the Center for the Advancement of Topological Semimetals (CATS), an Energy Frontier Research Center (EFRC) funded by the U.S. Department of Energy (DOE) Office of Science (fabrication and measurements), through the Ames National Laboratory under contract DE-AC0207CH11358, and partly by the AFOSR grant FA9550-23-1-0040 (data analysis), and partly by the NSF Career DMR-2143177 (manuscript writing). SYX also acknowledges the Corning Fund for Faculty Development. The work in the QM group was supported through the CATS, an EFRC funded by the DOE Office of Science (manuscript writing), through the Ames National Laboratory under contract DE-AC0207CH11358. QM also acknowledges the support from NSF through a CAREER award DMR-2143426 (material supplies) and the CIFAR Azrieli Global Scholars Program. C.T. acknowledges support from the Swiss National Science Foundation under project no. P2EZP2_191801 and from the Harvard University Climate Change Solutions Fund. J.N. acknowledges support from the Swiss National Science Foundation under project no. P2EZP2_195686. F.H. received funding by the National Natural Science Foundation of China under grant 52103353. P.J.W.M. acknowledges funding by the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (MiTopMat, grant agreement no. 715730). C.G. received funding by the Swiss National Science Foundation (grant no. PP00P2_176789). This material is based upon work supported by the Air Force Office of Scientific Research under award number FA2386-21-1-4059. K.T.L. acknowledges the support of HKRGC through Grants RFS2021-6S03, C6025-19G, AoE/P-701/20, 16310520, 16310219 and 16307622.
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 15 (1) Sequence Number: 3017 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723