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Gigahertz Frequency Antiferromagnetic Resonance and Strong Magnon-Magnon Coupling in the Layered Crystal CrCl3

Journal Article · · Physical Review Letters
 [1];  [2];  [2];  [2];  [2];  [2]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); DOE/OSTI
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

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. Furthermore, by breaking rotational symmetry, we further show that strong magnon-magnon coupling with large tunable gaps can be induced between the two resonant modes.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0018935
OSTI ID:
1613029
Alternate ID(s):
OSTI ID: 1545449
Journal Information:
Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 123; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (8)

Determining the phase diagram of atomically thin layered antiferromagnet CrCl3 journal November 2019
Enhancement of interlayer exchange in an ultrathin two-dimensional magnet journal September 2019
Probing and controlling magnetic states in 2D layered magnetic materials journal September 2019
Spin-wave confinement and coupling in organic-based magnetic nanostructures journal November 2019
Exchange-Enhanced Ultrastrong Magnon-Magnon Coupling in a Compensated Ferrimagnet journal September 2019
Antiferromagnetic magnons as highly squeezed Fock states underlying quantum correlations journal November 2019
Exchange-enhanced Ultrastrong Magnon-Magnon Coupling in a Compensated Ferrimagnet text January 2019
Antiferromagnetic magnons as highly squeezed Fock states underlying quantum correlations text January 2019

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