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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The electronic structure of potassium intercalated picene and coronene filmshas been studied using photoemission spectroscopy. Picene has additionally beenintercalated using sodium. Upon alkali metal addition core level as well asvalence band photoemission data signal a filling of previously unoccupiedstates of the two molecular materials due to charge transfer from potassium. Incontrast to the observation of superconductivity in K_xpicene and K_xcoronene(x ~ 3), none of the films studied shows emission from the Fermi level, i.e. wefind no indication for a metallic ground state. Several reasons for thisobservation are discussed.

Absence of photoemission from the Fermi level in potassium intercalated picene and coronene films: structure, polaron or correlation physics?