Elasto-Raman scattering: arsenic optical phonon as a probe of nematicity in BaFe${}_2$As${}_2$

J. -C. Philippe, J. Faria, A. Forget +5

We report a Raman scattering study of nematic degrees of freedom in the iron-based superconductor parent compound BaFe${}_2$As${}_2$ under tunable uniaxial strain. We demonstrate that…