Tunable Ultrastrong Magnon–Magnon Coupling Approaching the Deep-Strong Regime in a van der Waals Antiferromagnet

Antiferromagnetic (AFM) magnons in van der Waals (vdW) materials offer substantial potential for applications in magnonics and spintronics. In this study, we demonstrate ultrastrong magnon-magnon coupling in the GHz regime within a vdW AFM, achieving a maximum coupling rate of 0.91. Our investigation shows the tunability of coupling strength through temperature-dependent magnetic anisotropies. We compare coupling strength values derived from the gap size from the measured spectrum with those calculated directly through the coupling parameter and show that the gap size as a measure of coupling strength is limited for the ultrastrong coupling regime. Additionally, analytical calculations show the possibility to reach the deep-strong coupling regime by engineering the magnetic anisotropy. These findings highlight the potential of vdW AFMs as a model case to study magnetization dynamics in low-symmetry magnetic materials.

Authors

Institutions

Publication Details

Journal
ACS Nano
Published
2025-04-17
DOI
https://doi.org/10.1021/acsnano.5c02576
Citations
6
Primary Topic
Topological Materials and Phenomena
Type
article
Field-Weighted Citation Impact
7.48

Funders

Controls
|||
ALL TIME
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
article

Tunable Ultrastrong Magnon–Magnon Coupling Approaching the Deep-Strong Regime in a van der Waals Antiferromagnet

C. W. F. Freeman, Adam K. Budniak, Michel Bosman, Goki Eda et al.
6 citations
ACS Nano
Topological Materials and Phenomena
7.48
article

Tunable Ultrastrong Magnon–Magnon Coupling Approaching the Deep-Strong Regime in a van der Waals Antiferromagnet

C. W. F. Freeman, Adam K. Budniak, Michel Bosman, Goki Eda, Thomas Thomson, H. Kurebayashi, Henry De Libero, Harry Youel, M. Cubukcu, Zekun Xue
article en
6 citations

Abstract

Antiferromagnetic (AFM) magnons in van der Waals (vdW) materials offer substantial potential for applications in magnonics and spintronics. In this study, we demonstrate ultrastrong magnon-magnon coupling in the GHz regime within a vdW AFM, achieving a maximum coupling rate of 0.91. Our investigation shows the tunability of coupling strength through temperature-dependent magnetic anisotropies. We compare coupling strength values derived from the gap size from the measured spectrum with those calculated directly through the coupling parameter and show that the gap size as a measure of coupling strength is limited for the ultrastrong coupling regime. Additionally, analytical calculations show the possibility to reach the deep-strong coupling regime by engineering the magnetic anisotropy. These findings highlight the potential of vdW AFMs as a model case to study magnetization dynamics in low-symmetry magnetic materials.

ACS NanoVol. 19(16)
Agency for Science, Technology and Research (SG), National Physical Laboratory (GB), National University of Singapore (SG), Tohoku University (JP), London Centre for Nanotechnology (GB), University of Manchester (GB), Centre of Excellence for Advanced Materials (CN), Institute for Materials Research, Tohoku University, University College London (GB)
UK Research and Innovation, Ministry of Education - Singapore, Engineering and Physical Sciences Research Council
Life below water
Openalex Percentile: Top 3%
Topological Materials and Phenomena
7.48
DOIOpen Access PDFOpenAlex
AI Navigator

Ask Laika to Summarize, Analyze, and Connect papers live on the map.

Summarize Papers & Methodologies

Extract key findings, datasets, and comparative methods across publications.

Benchmark Rankings & Visual Analytics

Rank top research institutions, authors, funders, topics, and journals by Field-Weighted Citation Impact (FWCI) and paper volume with instant charts.

Connect Distant Disciplines

Bridge topological clusters on the map to find hidden collaborative intersections.