Speaker
Mr
Jan Eric Beckord
(University of Zurich)
Description
We present a study of the electronic structure of a hexagonal boron nitride (h-BN) monolayer on Cu(111). Epitaxial growth is confirmed by X-Ray photoelectron spectroscopy (XPS) and diffraction (XPD), and ARPES reproduces the bands aligned to the vacuum level as seen on other metal substrates. A very small upwards shift of the Shockley surface state corroborates the small substrate interaction. The work function is significantly reduced from 4.9 eV to 4.1 eV, but 2PPE measurements show that the Cu(111) image potential state energies are barely changed. However, we expect a significantly longer lifetime due to the reduced work function, as has been observed for other dielectric monolayers on copper.
Primary author
Mr
Jan Eric Beckord
(University of Zurich)
Co-authors
Dr
Matthias Hengsberger
(University of Zurich)
Prof.
Jürg Osterwalder
(University of Zurich)
