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

Bostroem EV, Parvini TS, Mciver JW, Rubio A, Kusminskiy SV, Sentef MA (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Physical Review Letters American Physical Society

Book Volume: 130

Article Number: 026701

Journal Issue: 2

DOI: 10.1103/PhysRevLett.130.026701

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.

Additional Organisation(s)

Sonderforschungsbereich/Transregio 306/1: Quantenkooperativität von Licht und Materie - QuCoLiMa

Related research project(s)

Optomagnomechanical arrays (B05) TRR 306: Quantenkooperativität von Licht und Materie – QuCoLiMa Jan. 1, 2021 - Dec. 31, 2024

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light DE Germany (DE) Max-Planck-Instituts für Struktur und Dynamik der Materie (MPSD) / Max Planck Institute for the Structure and Dynamics of Matter DE Germany (DE) University of Basque Country / Universidad del Pais Vasco (UPV) / Euskal Herriko Unibersitatea (EHU) ES Spain (ES)

How to cite

APA:

Bostroem, E.V., 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). https://dx.doi.org/10.1103/PhysRevLett.130.026701

MLA:

Bostroem, Emil Vinas, et al. "Direct Optical Probe of Magnon Topology in Two-Dimensional Quantum Magnets." Physical Review Letters 130.2 (2023).

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