Ultrafast spectroscopies can access the dynamics of electrons and nuclei at short
timescales, shedding light on nonequilibrium phenomena in materials. However …

Photoexcitation of the Mott insulator 1T-TaS 2 by an intense laser pulse leads to an ultrafast
transition toward a gapless phase. Besides the collapse of the electronic gap, the sudden …

Ultrathin bismuth exhibits rich physics including strong spin-orbit coupling, ferroelectricity,
nontrivial topology, and light-induced structural dynamics. We use ab initio calculations to …

Stacking nonpolar, monolayer materials has emerged as an effective strategy to harvest
ferroelectricity in two-dimensional (2D) van der Waals (vdW) materials. At a particular …

Squeezed states are quantum states of a harmonic oscillator in which the variance of two
conjugate variables each oscillate out of phase. Ultrafast optical excitation of crystals can …

We present a non-comprehensive review of some representative experimental studies in
crystalline condensed matter systems where the effects of intense ultrashort light pulses are …

The advances in phonon spectroscopy in homogeneous solids have unveiled extremely
useful physics regarding the contribution of phonon energies and mean-free paths to the …

Using first principles, we calculate the lattice thermal conductivity of Bi, Sb, and Bi-Sb alloys,
which are of great importance for thermoelectric and thermomagnetic cooling applications …

Ultrashort soft and hard x-ray pulses are sensitive probes of structural dynamics on the
picometer length and femtosecond time scales of electronic and atomic motions. Recent …

We investigate the nonequilibrium electronic structure and characteristic timescales in a
candidate excitonic insulator, Ta 2 Ni Se 5, using time-and angle-resolved photoemission …