Comparative Raman scattering study of crystal field excitations in Co-based quantum magnets
Co-based materials have recently been explored because of their potential to realize complex bond-dependent anisotropic magnetism. Prominent examples include ${\mathrm{Na}}_{2}{\mathrm{Co}}_{2}{\mathrm{TeO}}_{6}, {\mathrm{BaCo}}_{2}{({\mathrm{AsO}}_{4})}_{2}, {\mathrm{Na}}_{2}\mathrm{BaCo}{({\mathrm{PO}}_{4})}_{2}$, and ${\mathrm{Co}\mathit{X}}_{2}$ $(X=\mathrm{Cl},\mathrm{Br},\mathrm{I})$. In order to provide insight into the magnetic interactions in these compounds, we make a comparative analysis of their local crystal electric field excitations spectra via Raman scattering measurements. Combining these measurements with theoretical analysis confirms the validity of ${j}_{\mathrm{eff}}=1/2$ single-ion ground states for all compounds, and provides accurate experimental estimates of the local crystal distortions, which play a prominent role in the magnetic couplings between spin-orbital coupled Co moments.
Authors
- Haidong Zhou (ORCID: https://orcid.org/0000-0002-1595-1912)
- R. J. Cava (ORCID: https://orcid.org/0000-0002-3294-6867)
- Banasree S. Mou (ORCID: https://orcid.org/0009-0002-5683-5069)
- Yuanyuan Xu (ORCID: https://orcid.org/0000-0001-7235-5941)
- Natalia Drichko (ORCID: https://orcid.org/0000-0002-6538-1292)
- Ruidan Zhong (ORCID: https://orcid.org/0000-0003-1652-9454)
- Dmitry Smirnov (ORCID: https://orcid.org/0000-0001-6358-3221)
- Zhigang Jiang (ORCID: https://orcid.org/0000-0001-9884-3337)
- Stephen M. Winter (ORCID: https://orcid.org/0000-0002-0025-1446)
- Li Xiang (ORCID: https://orcid.org/0000-0002-1565-0271)
- Xinshu Zhang (ORCID: https://orcid.org/0000-0002-7597-573X)
Institutions
- Georgia Institute of Technology (US)
- Johns Hopkins University (US)
- Princeton University (US)
- National High Magnetic Field Laboratory (US)
- Wake Forest University (US)
- University of Tennessee at Knoxville (US)
Publication Details
- Journal
- Physical Review Materials
- Published
- 2024-08-15
- DOI
- https://doi.org/10.1103/physrevmaterials.8.084408
- Citations
- 12
- Primary Topic
- Advanced Condensed Matter Physics
- Type
- article
- Field-Weighted Citation Impact
- 3.73
Funders
- National Science Foundation
- U.S. Department of Energy