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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 BaFe 2 As 2 and Sr(Fe 1−x Co x) 2 As 2 (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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Y.-X. Yang, Y. Gallais, R. M. Fernandes, I Paul, L Chauvìère, et al.. Raman Scattering as a Probe of Charge Nematic Fluctuations in Iron Based Superconductors. Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013), 2014, ⟨10.7566/JPSCP.3.015001⟩. ⟨cea-01377145⟩

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