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  Direct Optical Probe of Magnon Topology in Two-Dimensional Quantum Magnets

Viñas Boström, E., Parvini, T. S., McIver, J. W., Rubio, A., Kusminskiy, S. V., & Sentef, M. A. (2023). Direct Optical Probe of Magnon Topology in Two-Dimensional Quantum Magnets. Physical Review Letters, 130(2): 026701. doi:10.1103/PhysRevLett.130.026701.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000A-B4B6-D Version Permalink: https://hdl.handle.net/21.11116/0000-000C-3F4E-8
Genre: Journal Article

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PhysRevLett.130.026701.pdf (Publisher version), 864KB
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2023
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© the Author(s). Published by the American Physical Society
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https://arxiv.org/abs/2207.04745 (Preprint)
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https://doi.org/10.1103/PhysRevLett.130.026701 (Publisher version)
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 Creators:
Viñas Boström, E.1, 2, Author           
Parvini, T. S.3, Author
McIver, J. W.2, 4, 5, Author           
Rubio, A.1, 2, 6, Author           
Kusminskiy, S. V.7, 8, Author
Sentef, M. A.2, 9, Author           
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Center for Free Electron Laser Science (CFEL), ou_persistent22              
3Institute of Physics, University of Greifswald, ou_persistent22              
4Ultrafast Transport in Quantum Materials, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3185036              
5Department of Physics, Columbia University, ou_persistent22              
6Center for Computational Quantum Physics, The Flatiron Institute, ou_persistent22              
7Institute for Theoretical Solid State Physics, RWTH Aachen University, ou_persistent22              
8Max Planck Institute for the Science of Light, ou_persistent22              
9Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              

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 Abstract: Controlling edge states of topological magnon insulators is a promising route to stable spintronics devices. However, to experimentally ascertain the topology of magnon bands is a challenging task. Here we derive a fundamental relation between the light-matter coupling and the quantum geometry of magnon states. This allows us to establish the two-magnon Raman circular dichroism as an optical probe of magnon topology in honeycomb magnets, in particular of the Chern number and the topological gap. Our results pave the way for interfacing light and topological magnons in functional quantum devices.

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Language(s): eng - English
 Dates: 2022-07-112022-12-122023-01-132023-01-13
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2207.04745
DOI: 10.1103/PhysRevLett.130.026701
 Degree: -

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Project name : We acknowledge support by the Max Planck Institute New York City Center for Non-Equilibrium Quantum Phenomena, the Cluster of Excellence Advanced Imaging of Matter (AIM), and Grupos Consolidados (IT1249-19). S. V. K. acknowledges funding by the Max Planck Society in the form of a Max Planck Research Group and by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—Project-ID 429529648—TRR 306 QuCoLiMa (“Quantum Cooperativity of Light and Matter”). M. A. S. acknowledges financial support through the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) via the Emmy Noether program (SE 2558/2). J. W. M acknowledges support from the Cluster of Excellence CUI: Advanced Imaging of Matter of the Deutsche Forschungsgemeinschaft (DFG), EXC 2056, Project No. 390715994, the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) SFB-925 Project No. 170620586. The Flatiron Institute is a Division of the Simons Foundation.
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Source 1

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 130 (2) Sequence Number: 026701 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1