Raman scattering as a probe of charge nematic fluctuations in iron based superconductors

A. Forget; A. Sacuto; D. Colson; I. Paul; L. Chauvi\`ere; M.-A. M\'easson; M. Cazayous; R. M Fernandes; Y. Gallais; Y.-X. Yang

arxiv: 1310.0934 · v2 · pith:J5BGAYOCnew · submitted 2013-10-03 · ❄️ cond-mat.supr-con · cond-mat.str-el

Raman scattering as a probe of charge nematic fluctuations in iron based superconductors

Y.-X. Yang , Y. Gallais , R. M Fernandes , I. Paul , L. Chauvi\`ere , M.-A. M\'easson , M. Cazayous , A. Sacuto

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D. Colson A. Forget

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classification ❄️ cond-mat.supr-con cond-mat.str-el

keywords nematicchargefluctuationsramanscatteringsuperconductorsbafebehavior

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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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Raman scattering as a probe of charge nematic fluctuations in iron based superconductors

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