Spin Waves and Magnetic Exchange Hamiltonian in CrSBr

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Abstract: CrSBr is an air‐stable two‐dimensional (2D) van der Waals semiconducting magnet with great technological promise, but its atomic‐scale magnetic interactions—crucial information for high‐frequency switching—are poorly understood. An experimental study is presented to determine the CrSBr magnetic exchange Hamiltonian and bulk magnon spectrum. The A‐type antiferromagnetic order using single crystal neutron diffraction is confirmed here. The magnon dispersions are also measured using inelastic neutron scattering and rigorously fit the excitation modes to a spin wave model. The magnon spectrum is well described by an intra‐plane ferromagnetic Heisenberg exchange model with seven nearest in‐plane exchanges. This fitted exchange Hamiltonian enables theoretical predictions of CrSBr behavior: as one example, the fitted Hamiltonian is used to predict the presence of chiral magnon edge modes with a spin‐orbit enhanced CrSBr heterostructure.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Spin Waves and Magnetic Exchange Hamiltonian in CrSBr ; day:07 ; month:07 ; year:2022 ; extent:7
Advanced science ; (07.07.2022) (gesamt 7)

Urheber
Scheie, Allen
Ziebel, Michael
Chica, Daniel G.
Bae, Youn June
Wang, Xiaoping
Kolesnikov, Alexander I.
Zhu, Xiaoyang
Roy, Xavier

DOI
10.1002/advs.202202467
URN
urn:nbn:de:101:1-2022070815041772252996
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:25 MESZ

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Beteiligte

  • Scheie, Allen
  • Ziebel, Michael
  • Chica, Daniel G.
  • Bae, Youn June
  • Wang, Xiaoping
  • Kolesnikov, Alexander I.
  • Zhu, Xiaoyang
  • Roy, Xavier

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