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 employ time- and angle-resolved photoemission spectroscopy to study thespin- and valley-selective photoexcitation and dynamics of free carriers at theK and K' points in singly-oriented single layer WS$_2$/Au(111). Our resultsreveal that in the valence band maximum an ultimate valley polarization of freeholes of 84$\,$% can be achieved upon excitation with circularly polarizedlight at room temperature. Notably, we observe a significantly smaller valleypolarization for the photoexcited free electrons in the conduction bandminimum. Clear differences in the carrier dynamics between electrons and holesimply intervalley scattering processes into dark states being responsible forthe efficient depolarization of the excited electron population.

Larger than 80$\,$% Valley Polarization of Free Carriers in Singly-Oriented Single Layer WS$_2$ on Au(111)