Local orthorhombicity in the magnetic $C_4$ phase of the hole-doped iron-arsenide superconductor Sr${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$

Benjamin A. Frandsen, Keith M. Taddei, Ming Yi +10

We report temperature-dependent pair distribution function measurements of Sr${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$, an iron-based superconductor system that contains a magnetic phase with r…