%0 Journal Article
%A Chen, Lebing
%A Chung, Jae-Ho
%A Chen, Tong
%A Duan, Chunruo
%A Schneidewind, Astrid
%A Radelytskyi, Igor
%A Voneshen, David J.
%A Ewings, Russell A.
%A Stone, Matthew B.
%A Kolesnikov, Alexander I.
%A Winn, Barry
%A Chi, Songxue
%A Mole, R. A.
%A Yu, D. H.
%A Gao, Bin
%A Dai, Pengcheng
%T Magnetic anisotropy in ferromagnetic CrI 3
%J Physical review / B
%V 101
%N 13
%@ 2469-9950
%C Woodbury, NY
%I Inst.
%M FZJ-2020-02490
%P 134418
%D 2020
%X We use neutron scattering to show that ferromagnetic (FM) phase transition in the two-dimensional (2D)honeycomb lattice CrI3 is a weakly first order transition and controlled by spin-orbit coupling (SOC) inducedmagnetic anisotropy, instead of magnetic exchange coupling as in a conventional ferromagnet. With increasingtemperature, the magnitude of magnetic anisotropy, seen as a spin gap at the Brillouin zone center, decreasesin a power law fashion and vanishes at TC, while the in-plane and c-axis spin-wave stiffnesses associated withmagnetic exchange couplings remain robust at TC.We also compare parameter regimes where spin waves in CrI3can be described by a Heisenberg Hamiltonian with Dzyaloshinskii-Moriya interaction or a Heisenberg-KitaevHamiltonian. These results suggest that the SOC induced magnetic anisotropy plays a dominant role in stabilizingthe FM order in single layer 2D van der Waals ferromagnets.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000525840300002
%R 10.1103/PhysRevB.101.134418
%U https://juser.fz-juelich.de/record/877883