Photon-based spectroscopies have had a significant impact on both fundamental science
and applications by providing an efficient approach to investigate the microscopic physics of …

We investigate the quasiparticle dynamics in the prototypical heavy fermion CeCoIn 5 using
ultrafast optical pump-probe spectroscopy. Our results indicate that this material system …

Recent optical conductivity measurements reveal the presence of Hubbard excitons in
certain Mott insulators. In light of these results, it is important to revisit the dynamics of these …

It has been more than 30 years since the discovery of high-temperature superconductors
(HTSCs). The number of articles published on the subject is huge, but the cause of the high …

The quasiparticle relaxation dynamics of the iron-based superconductor CsCa 2 Fe 4 As 4 F
2 (T c∼ 29 K) were investigated using ultrafast optical spectroscopy. A pseudogap (Δ PG …

Complex electron interactions underlie the electronic structure of several families of
quantum materials. In particular, the strong electron Coulomb repulsion is considered the …

We study the ultrafast dynamics of the multiband iron-based superconductor CaKFe 4 As 4
via time-resolved optical reflectivity. We observe a long-lived 5-GHz oscillation of the …

Ultrafast perturbations offer a unique tool to manipulate correlated systems due to their
ability to promote transient behaviors with no equilibrium counterpart. A widely employed …

The quasiparticle relaxation dynamics of the iron-based superconductor CsCa $ _2 $ Fe $
_4 $ As $ _4 $ F $ _2 $($ T_c $$\sim $29 K) were investigated using ultrafast optical …

We report an intense near-infrared pump, c-axis terahertz probe measurement on an
electron-doped cuprate superconductor Pr 0.88 LaCe 0.12 CuO 4 with T c= 22 K. The major …