Tunable Ultrastrong Magnon–Magnon Coupling Approaching the Deep-Strong Regime in a van der Waals Antiferromagnet
Authors: Charlie W. F. Freeman, Harry Youel, Adam K. Budniak, Zekun Xue, Henry De Libero, Thomas Thomson, Michel Bosman, Goki Eda, Hidekazu Kurebayashi, Murat Cubukcu