Evidence of Magnon-Mediated Orbital Magnetism in a Quasi-2D Topological Magnon Insulator

Alahmed L, Zhang X, Wen J, Xiong Y, Li Y, Zhang LC, Lux F, Freimuth F, Mahdi M, Mokrousov Y, Novosad V, Kwok WK, Yu D, Zhang W, Li P, Lee YS (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Nano Letters American Chemical Society

Book Volume: 22

Pages Range: 5114-5119

Journal Issue: 13

DOI: 10.1021/acs.nanolett.2c00562

Abstract

We explore spin dynamics in Cu(1,3-bdc), a quasi-2D topological magnon insulator. The results show that the thermal evolution of the Landé g factor (g) is anisotropic: gin-plane decreases while gout-of-plane increases with increasing temperature T. Moreover, the anisotropy of the g factor (Δg) and the anisotropy of saturation magnetization (ΔMs) are correlated below 4 K, but they diverge above 4 K. We show that the electronic orbital moment contributes to the g anisotropy at lower T, while the topological orbital moment induced by thermally excited spin chirality dictates the g anisotropy at higher T. Our work suggests an interplay among topology, spin chirality, and orbital magnetism in Cu(1,3-bdc).

Involved external institutions

Stanford National Accelerator Laboratory (SLAC) US United States (USA) (US) Auburn University US United States (USA) (US) Southern University of Science and Technology CN China (CN) Oakland University US United States (USA) (US) Argonne National Laboratory US United States (USA) (US) Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) University of North Carolina at Chapel Hill US United States (USA) (US)

How to cite

APA:

Alahmed, L., Zhang, X., Wen, J., Xiong, Y., Li, Y., Zhang, L.-C.,... Lee, Y.S. (2022). Evidence of Magnon-Mediated Orbital Magnetism in a Quasi-2D Topological Magnon Insulator. Nano Letters, 22(13), 5114-5119. https://dx.doi.org/10.1021/acs.nanolett.2c00562

MLA:

Alahmed, Laith, et al. "Evidence of Magnon-Mediated Orbital Magnetism in a Quasi-2D Topological Magnon Insulator." Nano Letters 22.13 (2022): 5114-5119.

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