English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We study the ultrafast quasiparticle dynamics in and below the ZnO conductionband using femtosecond time-resolved two-photon photoelectron spectroscopy.Above band gap excitation causes hot electron relaxation by electron-phononscattering down to the Fermi level $E_\text{F}$ followed by ultrafast (200 fs)formation of a surface exciton (SX). Transient screening of the Coulombinteraction reduces the SX formation probability at high excitation densitiesnear the Mott limit. Located just below the surface, the SX are stable withregard to hydrogen-induced work function modifications and thus the idealprerequisite for resonant energy transfer applications.

Ultrafast exciton formation at the ZnO(10${\overline{\textbf{1}}}$0) surface