In the last two decades non-equilibrium spectroscopies have evolved from avant-garde
studies to crucial tools for expanding our understanding of the physics of strongly correlated …

The modern electron microscope, as a result of recent revolutionary developments and
many evolutionary ones, now yields a wealth of quantitative knowledge pertaining to …

Ultrafast lasers are an increasingly important tool to control and stabilize emergent phases
in quantum materials. Among a variety of possible excitation protocols, a particularly …

Unveiling the nature of the bosonic excitations that mediate the formation of Cooper pairs is
a key issue for understanding unconventional superconductivity. A fundamental step toward …

The interplay between the electronic and lattice degrees of freedom in nonequilibrium states
of strongly correlated systems has been debated for decades. Although progress has been …

The ultrafast dynamics of electrons and collective modes in systems out of equilibrium is
crucially governed by the energy transfer from electronic degrees of freedom, where the …

Dynamical information on spin degrees of freedom of proteins or solids can be obtained by
NMR and electron spin resonance. A technique with similar versatility for charge degrees of …

Recent advances in high-intensity electron and X-ray pulsed sources now make it possible
to directly observe atomic motions as they occur in barrier-crossing processes. These rare …

Distinctive superconducting behaviors between bulk and monolayer FeSe make it
challenging to obtain a unified picture of all FeSe-based superconductors. We investigate …

The transient response of Ba (Fe 1− x Co x) 2 As 2, x= 0.08 was studied by pump-probe
optical reflectivity. After ultrafast photoexcitation, hot electrons were found to relax with two …