M. Beyer

TL;DR: Effectively, the atomic motions that result from the optically induced change in the electronic spatial distribution are directly observed and the degree of cooperativity in the observed structural dynamics is remarkable and illustrates the importance of obtaining atomic-level perspectives of the processes directing the physics of strongly correlated systems.

TL;DR: A pronounced spin-phonon coupling in pnictides that supports rapid development of a macroscopic order on small vibrational displacement even without breaking the symmetry of the crystal is attest to.

TL;DR: This work measures the anisotropic midinfrared response of electrons and phonons in bulk YBa(2)Cu(3)O(7-δ) after femtosecond photoexcitation and introduces a powerful concept probing electron-lattice interactions in a variety of complex materials.

TL;DR: The results imply that on the subpicosecond time scale when melting and subsequent initial recovery of the electronic order takes place the lattice remains unperturbed.

TL;DR: High resolution studies of the temperature (T) dependence of the q=0 phonon spectrum in the quasi-one-dimensional charge density wave (CDW) compound K(0.3)MoO(3) utilizing time-resolved optical spectroscopy show that numerous modes that appear below T(c) show pronounced T dependences of their amplitudes, frequencies, and dampings.