Phonon-induced rotation of the electronic nematic director in superconducting Bi${}_2$Se${}_3$

Matthias Hecker, Rafael M. Fernandes

The doped topological insulator $A_x\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{e}}_3$, with $A=\{\mathrm{Cu},\mathrm{Sr},\mathrm{Nb}\}$, becomes a nematic superconductor below $T_c\sim 3-4\mathrm{K}$. T…