Collective excitations of dynamic Fermi surface deformations in BaFe${}_2$(As${}_{0.5}$P${}_{0.5}$)${}_2$

S. -F. Wu, W. -L. Zhang, D. Hu +7

We use electronic Raman scattering to study the low-energy excitations in BaFe${}_2$(As${}_{0.5}$P${}_{0.5}$)${}_2$ ($T_c\approx 16$ K) samples. In addition to a superconducting pair brea…