We study the rare-earth magnets on a honeycomb lattice, and are particularly interested in the experimental consequences of the highly anisotropic spin interaction due to the spin-orbit entanglement. We perform a high-temperature series expansion using a generic nearest-neighbor Hamiltonian with anisotropic interactions, and obtain the heat capacity, the parallel and perpendicular spin susceptibilities, and the magnetic torque coefficients. We further examine the electron spin resonance linewidth as an important signature of the anisotropic spin interactions. Due to the small interaction energy scale of the rare-earth moments, it is experimentally feasible to realize the strong-field regime. Therefore, we perform the spin-wave analysis and study the possibility of topological magnons when a strong field is applied to the system. The application and relevance to the rare-earth Kitaev materials are discussed.
Cited by 1
Seong-Hoon Jang et al., Computational design of
-electron Kitaev magnets: Honeycomb and hyperhoneycomb compounds
Phys. Rev. Materials 4, 104420 (2020) [Crossref]
Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- 1 University of Utah [UU]
- 2 Kavli Institute for Theoretical Physics [KITP]
- 3 University of Hong Kong [HKU]
- 4 复旦大学 / Fudan University
- Ministry of Science and Technology of the People's Republic of China [MOST]
- National Science Foundation [NSF]
- Research Grants Council, University Grants Committee (through Organization: University Grants Committee [UGC])