Speaker
Description
Charge-density waves (CDWs) represent a model system for broken-symmetry states arising from the strong interplay of the charge and lattice degrees of freedom. Manipulation of such collective states promises microscopic insight into the fundamental interactions underlying the transition, and novel opportunities for applications. Time- and angle-resolved photoemission spectroscopy (trARPES) as well as ultrafast diffraction probes nowadays yield an unprecedented view on the intricate dynamics in such systems. I will discuss recent examples of photoinduced phase transitions in CDW systems, including nonthermal CDW order at electronic temperatures far above the equilibrium transition temperature, and a transient modification of quasiparticle scattering rates due to the influence of the CDW energy gap.
