Effects of Nematic Fluctuations on the Elastic Properties of Iron Arsenide Superconductors
Effects of Nematic Fluctuations on the Elastic Properties of Iron Arsenide Superconductors
We demonstrate that the changes in the elastic properties of the FeAs systems, as seen in our resonant ultrasound spectroscopy data, can be naturally understood in terms of fluctuations of emerging nematic degrees of freedom. Both the softening of the lattice in the normal, tetragonal phase as well as its …