Nematic spin fluid in the tetragonal phase of BaFe$_{2}$As$_{2}$
By L. Harriger, Huiqian Luo, Mengshu Liu, T. Perring, C. Frost, Jiangping Hu, M. Norman, P. Dai. 2010
134 citations recorded by the source corpus.
We use inelastic neutron scattering to study spin waves below and above T{sub N} in iron-arsenide BaFe{sub 2}As{sub 2}. In the low-temperature orthorhombic phase, we find highly anisotropic spin waves with a large damping along the antiferromagnetic a-axis direction. On warming the system to the paramagnetic tetragonal phase, the low-energy spin waves evolve into quasi-elastic excitations, while the anisotropic spin excitations near the zone boundary persist. These results strongly suggest the presence of a spin nematic fluid in the tetragonal phase of BaFe{sub 2}As{sub 2}, which may cause the electronic and orbital anisotropy observed in these materials.
Subfields: Accounting, Electronic, Optical and Magnetic Materials, Molecular Biology
View Paper: https://www.semanticscholar.org/paper/4b6d87447464a8eca59c794b8bea463fe703368d
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Citations in the corpus
- Superconductivity in iron compounds (2011, background): “…order, which breaks the tetragonal basal plane a–b axis symmetry, and its possible role in mediating the superconductivity in FePn/Ch is a subject of significant interest; see also Chuang et al. (2010), Chu et al. (2010), Fernandes et al. (2010b), Harriger et al. (2011), and Park et al. (2010).”
- Iron-based high transition temperature superconductors (2014, methodology): “5b show the dispersion of spin waves in BaFe2As2 along the [1, K] and [H, 0] directions in reciprocal space, where the CAF order occurs at the QAF = (1, 0) wave vector position [80].”