Picosecond Trajectory of Two-dimensional Vortex Motion in FeSe${}_{0.5}$Te${}_{0.5}$ Visualized by Terahertz Second Harmonic Generation

Sachiko Nakamura, Haruki Matsumoto, Hiroki Ogawa +4

We have investigated the vortex dynamics in a thin film of an iron-based superconductor FeSe${}_{0.5}$Te${}_{0.5}$ by observing second-harmonic generation (SHG) in the THz frequency ra…