Widespread orthorhombic fluctuations in the (Sr,Na)Fe${}_2$As${}_2$ family of superconductors

Benjamin A. Frandsen, Keith M. Taddei, Daniel E. Bugaris +7

We report comprehensive pair distribution function measurements of the hole-doped iron-based superconductor system Sr${}_{1-x}$Na${}_x$Fe${}_2$As${}_2$. Structural refinements performed…