Raman scattering as a probe of charge nematic fluctuations in iron based superconductors
Abstract
We report Raman scattering measurement of charge nematic fluctuations in the tetragonal phase of BaFe2As2 and Sr(Fe1-xCox)2As2 (x=0.04) single crystals. In both systems, the observed nematic fluctuations are found to exhibit divergent Curie-Weiss like behavior with very similar characteristic temperature scales, indicating a universal tendency towards charge nematic order in 122 iron-based superconductors.
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