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Dipolar spin wave packet transport in a van der Waals antiferromagnet

Yue Sun1,2*, Fanhao Meng2,3*, Changmin Lee2,4*, Aljoscha Soll5*, Hongrui Zhang3*, Ramamoorthy Ramesh1,2,3*, Jie Yao2,3*, Zdeněk Sofer5*, Joseph Orenstein1,2*

1 Department of Physics, University of California, Berkeley, California 94720, USA

2 Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

3 Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA

4 Department of Physics, Hanyang University, Seoul 04763, Republic of Korea

5 Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic

* Corresponding authors emails: yue.sun@berkeley.edu, fhmeng@berkeley.edu, cmlee23@hanyang.ac.kr, Aljoscha1.Soll@vscht.cz, hongruizhang@berkeley.edu, rramesh@berkeley.edu, yaojie@berkeley.edu, zdenek.sofer@vscht.cz, jworenstein@lbl.gov
DOI10.24435/materialscloud:9x-ds [version v1]

Publication date: Dec 08, 2023

How to cite this record

Yue Sun, Fanhao Meng, Changmin Lee, Aljoscha Soll, Hongrui Zhang, Ramamoorthy Ramesh, Jie Yao, Zdeněk Sofer, Joseph Orenstein, Dipolar spin wave packet transport in a van der Waals antiferromagnet, Materials Cloud Archive 2023.191 (2023), https://doi.org/10.24435/materialscloud:9x-ds


Antiferromagnets are promising platforms for transduction and transmission of quantum information via magnons — the quanta of spin waves — and they offer advantages over ferromagnets in regard to dissipation, speed of response, and robustness to external fields. Recently, transduction was shown in a van der Waals antiferromagnets, where strong spin-exciton coupling enables readout of the amplitude and phase of coherent magnons by photons of visible light. This discovery shifts the focus of research to transmission, specifically to exploring the nonlocal interactions that enable magnon wave packets to propagate. Here we demonstrate that magnon propagation is mediated by the long-range dipole-dipole interaction. This coupling is an inevitable consequence of fundamental electrodynamics, and as such, will likely mediate the propagation of spin at long wavelengths in the entire class of van der Waals magnets currently under investigation. Successfully identifying the mechanism of spin propagation provides a set of optimization rules, as well as caveats, that are essential for any future applications of these promising systems.

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2.3 MiB Source data for all figures
497.8 KiB Mathematica notebook for magnon dispersion calculation


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External references

Preprint (Paper in which the method is described.)


spin transport time-resolved Kerr microscopy magnetostatic spin waves antiferromagnets

Version history:

2023.191 (version v1) [This version] Dec 08, 2023 DOI10.24435/materialscloud:9x-ds