2019/02/28 by David MacNeill, Justin T. Hou, Dahlia Klein +5 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #2D Materials and Applications #Antiferromagnetism #Atomic physics #Condensed matter physics #Coupling (piping) #Ferromagnetism #Magnon #Materials science #Perovskite Materials and Applications #Physics #Physics of Superconductivity and Magnetism #Resonance (particle physics) #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.123.047204
published as Phys. Rev. Lett. 123, 047204 (2019)
openalex created_date 2019/02/21 · arxiv created 2019/05/02 · openalex publication_date 2019/07/24 · arxiv updated 2019/07/31 · openalex updated_date 2026/08/06
We report broadband microwave absorption spectroscopy of the layered antiferromagnet CrCl3. We observe a rich structure of resonances arising from quasi-two-dimensional antiferromagnetic dynamics. Because of the weak interlayer magnetic coupling in this material, we are able to observe both optical and acoustic branches of antiferromagnetic resonance in the GHz frequency range and a symmetry-protected crossing between them. By breaking rotational symmetry, we further show that strong magnon-magnon coupling with large tunable gaps can be induced between the two resonant modes.