TY  - JOUR
AU  - Chen, Lebing
AU  - Chung, Jae-Ho
AU  - Chen, Tong
AU  - Duan, Chunruo
AU  - Schneidewind, Astrid
AU  - Radelytskyi, Igor
AU  - Voneshen, David J.
AU  - Ewings, Russell A.
AU  - Stone, Matthew B.
AU  - Kolesnikov, Alexander I.
AU  - Winn, Barry
AU  - Chi, Songxue
AU  - Mole, R. A.
AU  - Yu, D. H.
AU  - Gao, Bin
AU  - Dai, Pengcheng
TI  - Magnetic anisotropy in ferromagnetic CrI 3
JO  - Physical review / B
VL  - 101
IS  - 13
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2020-02490
SP  - 134418
PY  - 2020
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000525840300002
DO  - DOI:10.1103/PhysRevB.101.134418
UR  - https://juser.fz-juelich.de/record/877883
ER  -