Pseudospin-lattice coupling in the spin-orbit Mott insulator Sr2IrO4
SCIE
SCOPUS
- Title
- Pseudospin-lattice coupling in the spin-orbit Mott insulator Sr2IrO4
- Authors
- Porras, J.; Bertinshaw, J.; Liu, H.; Khaliullin, G.; Sung, N. H.; Kim, Jong-Woo; Francoual, S.; Steffens, P.; Deng, G.; Moretti Sala, M.; Efimenko, A.; Said, A.; Casa, D.; Huang, X.; Gog, T.; Kim, Jungho; Keimer, B.; Kim, Bumjoon
- Date Issued
- 2019-02
- Publisher
- AMER PHYSICAL SOC
- Abstract
- Spin-orbit entangled magnetic dipoles, often referred to as pseudospins, provide a new avenue to explore novel magnetism inconceivable in the weak spin-orbit coupling limit, but the nature of their low-energy interactions remains to be understood. We present a comprehensive study of the static magnetism and low-energy pseudospin dynamics in the archetypal spin-orbit Mott insulator Sr2IrO4. We find that in order to understand even basic magnetization measurements, a formerly overlooked in-plane anisotropy is fundamental. In addition to magnetometry, we use neutron diffraction, inelastic neutron scattering, and resonant elastic and inelastic x-ray scattering to identify and quantify the interactions that determine the global symmetry of the system and govern the linear responses of pseudospins to external magnetic fields and their low-energy dynamics. We find that a pseudospin-only Hamiltonian is insufficient for an accurate description of the magnetism in Sr2IrO4 and that pseudospin-lattice coupling is essential. This finding should be generally applicable to other pseudospin systems with sizable orbital moments sensitive to anisotropic crystalline environments.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/95292
- DOI
- 10.1103/PhysRevB.99.085125
- ISSN
- 1098-0121
- Article Type
- Article
- Citation
- PHYSICAL REVIEW B, vol. 99, no. 8, page. 085125, 2019-02
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.