173 citations · 325 across the 8 of their papers we have counts for
5 papers · 1 filter
Three-Fold Diffraction Symmetry in Epitaxial Graphene and the SiC Substrate
David A. Siegel, Shuyun Zhou, Farid El Gabaly +3
The crystallographic symmetries and spatial distribution of stacking domains in graphene films on SiC have been studied by low energy electron diffraction (LEED) and dark field ima…
Coinage-metal capping effects on the spin-reorientations of Co/Ru(0001)
Farid el Gabaly, Kevin F. McCarty, Andreas K. Schmid +5
Thin films of Co/Ru(0001) are known to exhibit an unusual spin reorientation transition (SRT) coupled to the completion of Co atomic layers for Co thicknesses under 4 layers. By me…
Origin of the energy bandgap in epitaxial graphene
S. Y. Zhou, D. A. Siegel, A. V. Fedorov +4
We studied the effect of quantum confinement on the size of the band gap in single layer epitaxial graphene. Samples with different graphene terrace sizes are studied by using low…
Labyrinthine Island Growth during Pd/Ru(0001) Heteroepitaxy
Nicolas Rougemaille, Farid El Gabaly, Roland Stumpf +4
Using low energy electron microscopy we observe that Pd deposited on Ru only attaches to small sections of the atomic step edges surrounding Pd islands. This causes a novel epitaxi…
Determining the structure of Ru(0001) from low-energy electron diffraction of a single terrace
J. de la Figuera, J. M. Puerta, J. I. Cerda +2
While a perfect hcp (0001) surface has three-fold symmetry, the diffraction patterns commonly obtained are six-fold symmetric. This apparent change in symmetry occurs because on a…