Femtosecond studies of electron dynamics at interfaces.
A delocalized electron at a metal-dielectric interface interacts with the adlayer and spatially localizes or self-traps on the femtosecond time scale into what is termed a small polaron. The dynamics can be studied by two-photon photoemission. Theoretical and experimental analyses reveal the interaction energy and the lattice vibrational mode that mediates electron localization. These results contribute to a fundamental understanding of electron behavior in weakly bonded solids and can lead to a better understanding of carrier dynamics in many different systems, including organic light-emitting diodes.
Ge
N H
NH
Department of Chemistry, University of California, Berkeley, California 94720, USA.
Wong
C M
CM
Harris
C B
CB
D015502:Absorptiometry, Photon; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004563:Electrochemistry; D004583:Electrons; D008670:Metals / Q000737:chemistry; D013499:Surface Properties
D008670:Metals