Journal
PHYSICAL REVIEW X
Volume 10, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevX.10.011062
Keywords
-
Categories
Funding
- Natural Science and Engineering Research Council (NSERC) of Canada
- Ministry of Science and Technology (MOST) in Taiwan [106-2119-M-002-035-MY3, 108-2622-8-002-016]
- AI-MAT Project from the Ministry of Education in Taiwan [108L900903]
- Academia Sinica [AS-iMATE-108-11]
- MOST-Taiwan [108-2112-M-027-002-MY3]
- McMaster University
- Canada Foundation for Innovation
Ask authors/readers for more resources
The discovery of massless Dirac electrons in graphene and topological Dirac-Weyl materials has prompted a broad search for bosonic analogues of such Dirac particles. Recent experiments have found evidence for Dirac magnons above an Ising-like ferromagnetic ground state in a two-dimensional (2D) kagome lattice magnet and in the van der Waals layered honeycomb crystal CrI3, and in a 3D Heisenberg magnet Cu3TeO6. Here, we report our inelastic neutron scattering investigation on a large single crystal of a stacked honeycomb lattice magnet CoTiO3, which is part of a broad family of ilmenite materials. The magnetically ordered ground state of CoTiO3 features ferromagnetic layers of Co2+, stacked antiferromagnetically along the c axis. The magnon dispersion relation is described very well with a simple magnetic Hamiltonian with strong easy-plane exchange anisotropy. Importantly, a magnon Dirac cone is found along the edge of the 3D Brillouin zone. Our results establish CoTiO3 as a model pseudospin-1/2 material to study interacting Dirac bosons in a 3D quantum XY magnet.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available