Survival of Floquet-Bloch States in the Presence of Scattering.

ABSTRACT: Floquet theory has spawned many exciting possibilities for electronic structure control with light, with enormous potential for future applications. The experimental demonstration in solids, however, remains largely unrealized. In particular, the influence of scattering on the formation of Floquet-Bloch states remains poorly understood. Here we combine time- and angle-resolved photoemission spectroscopy with time-dependent density functional theory and a two-level model with relaxation to investigate the survival of Floquet-Bloch states in the presence of scattering. We find that Floquet-Bloch states will be destroyed if scattering-activated by electronic excitations-prevents the Bloch electrons from following the driving field coherently. The two-level model also shows that Floquet-Bloch

SUBMITTER: Aeschlimann S 

PROVIDER: S-EPMC8227476 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature