Approaching ideal graphene: The structure of hydrogen-intercalated graphene on 6H-SiC(0001)

Abstract

We measure the adsorption height of hydrogen-intercalated quasi-free-standing monolayer graphene on the (0001) face of 6H silicon carbide by the normal incidence x-ray standing wave technique. A density functional calculation for the full ($6\sqrt{3}\times 6\sqrt{3}$)-R30${}^{\circ }$ unit cell, based on a van der Waals corrected exchange correlation functional, finds a purely physisorptive adsorption height in excellent agreement with experiments, a very low buckling of the graphene layer, a very homogeneous electron density at the interface and the lowest known adsorption energy per atom for graphene on any substrate. A structural comparison to other graphenes suggests that hydrogen intercalated graphene on 6H-SiC(0001) approaches ideal graphene.

6 pages, 4 figures

References in corpus (4)

• Chiral tunneling and the Klein paradox in graphene
• Landau Level Splitting in Graphene in High Magnetic Fields
• Long-range correlation energy calculated from coupled atomic response functions
• Symmetry Breaking in Few Layer Graphene Films

Cited by in corpus (21)

• Binding and Electronic Level Alignment of $\mathbf{\pi }$-Conjugated Systems on Metals
• On adatomic-configuration-mediated correlation between electrotransport and electrochemical properties of graphene
• The structure and evolution of semiconducting buffer graphene grown on SiC(0001)
• Spin splitting and strain in epitaxial monolayer WSe${}_2$ on graphene
• Epitaxial graphene/Ge interfaces: a minireview
• Stabilizing an atomically thin quantum spin Hall insulator at ambient conditions: Graphene-intercalation of indenene
• Surface charge-transfer doping a quantum-confined silver monolayer beneath epitaxial graphene
• Surfactant-Mediated Epitaxial Growth of Single-Layer Graphene in an Unconventional Orientation on SiC
• Vertical structure of Sb-intercalated quasifreestanding graphene on SiC(0001)
• Revealing the nature of defects in quasi free standing mono-layer graphene on SiC(0001) by means of Density Functional Theory
• Edge states and ballistic transport in zig-zag graphene ribbons: the role of SiC polytypes
• Thermodynamics and kinetics of H adsorption and intercalation for graphene on 6H-SiC(0001) from first-principles calculations
• Observation of increasing bending rigidity of graphene with temperature
• Boron nitride on SiC(0001)
• Quasi-free-standing AA-stacked bilayer graphene induced by calcium intercalation of the graphene-silicon carbide interface
• How transparent is graphene? A surface science perspective on remote epitaxy
• Formation of Graphene atop a Si adlayer on the C-face of SiC
• Determination of the Spacing Between Hydrogen-Intercalated Quasi-Free-Standing Monolayer Graphene and 6H-SiC(0001) Using Total-Reflection High-Energy Positron Diffraction
• Graphene as a p-type metal for ultimate miniaturization
• Solving the Phase Problem of Diffraction: X-ray Standing Waves Imaging on Bismuthene/SiC(0001)
• Hydrogen-mediated CVD epitaxy of Graphene on SiC: growth mechanism and atomic configuration