Nematic crossover in BaFe${}_2$As${}_2$ under uniaxial stress

Xiao Ren, Lian Duan, Yuwen Hu +5

Raman scattering can detect spontaneous point-group symmetry breaking without resorting to single-domain samples. Here we use this technique to study $\mathrm{BaF}{\mathrm{e}}_2\mathrm{A}{\mathrm{s}}_2$, the par…