Origin of the resistive anisotropy in the electronic nematic phase of BaFe${}_2$As${}_2$ revealed by optical spectroscopy

C. Mirri, A. Dusza, S. Bastelberger +5

We perform, as a function of uniaxial stress, an optical-reflectivity investigation of the representative 'parent' ferropnictide BaFe${}_2$As${}_2$ in a broad spectral range, across th…