Is graphene on Ru(0001) a nanomesh?
Thomas Brugger (1), Sebastian G\"unther (2), Bin Wang (3), Hugo Dil (1, and 4), Marie-Laure Bocquet (3, 2), J\"urg Osterwalder (1), Joost, Wintterlin (2), Thomas Greber (1) ((1) Physik-Institut, Universit\"at, Z\"urich, Z\"urich, Switzerland, (2) Department Chemie
TL;DR
This paper compares the electronic structures of graphene and boron nitride nanomeshes on Ru(0001), revealing differences in charge transfer and electrostatic potential, and providing insights into their surface topography and electronic properties.
Contribution
It provides a comparative analysis of graphene and boron nitride nanomeshes on Ru(0001), highlighting their electronic differences and surface potential variations.
Findings
Graphene shows a Fermi surface indicating charge transfer.
Both materials display a pi-band gap at the K point.
Xe adsorption reveals a corrugated electrostatic potential.
Abstract
The electronic structure of a single layer graphene on Ru(0001) is compared with that of a single layer hexagonal boron nitride nanomesh on Ru(0001). Both are corrugated sp2 networks and display a pi-band gap at the K point of their 1 x 1 Brillouin zone. Graphene has a distinct Fermi surface which indicates that 0.1 electrons are transferred per 1 x 1 unit cell. Photoemission from adsorbed xenon identifies two distinct Xe 5p1/2 lines, separated by 240 meV, which reveals a corrugated electrostatic potential energy surface. These two Xe species are related to the topography of the system and have different desorption energies.
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