title: Flower-shaped domains and wrinkles in trilayer epitaxial graphene on silicon carbide.
abstract: Trilayer graphene is of particular interest to the 2D materials community because of its unique tunable electronic structure. However, to date, there is a lack of fundamental understanding of the properties of epitaxial trilayer graphene on silicon carbide. Here, following successful synthesis of large-area uniform trilayer graphene, atomic force microscopy (AFM) showed that the trilayer graphene on 6H-SiC(0001) was uniform over a large scale. Additionally, distinct defects, identified as flower-shaped domains and isolated wrinkle structures, were observed randomly on the surface using scanning tunneling microscopy and spectroscopy (STM/STS). These carbon nanostructures formed during growth, has different structural and electronic properties when compared with the adjacent flat regions of the graphene. Finally, using low temperature STM/STS at 4K, we found that the isolated wrinkles showed an irreversible rotational motion between two 60° configurations at different densities of states.
authors: CNRS- Laboratoire de Photonique et de Nanostructures (LPN), Route de Nozay, 91460 Marcoussis, France.
authors: B
authors: B
authors: Lalmi
authors: CNRS- Laboratoire de Photonique et de Nanostructures (LPN), Route de Nozay, 91460 Marcoussis, France.
authors: J C
authors: JC
authors: Girard
authors: CNRS- Laboratoire de Photonique et de Nanostructures (LPN), Route de Nozay, 91460 Marcoussis, France.
authors: E
authors: E
authors: Pallecchi
authors: Synchrotron-SOLEIL, Saint-Aubin, BP48, F91192 Gif sur Yvette Cedex, France.
authors: M
authors: M
authors: Silly
authors: CNRS- Laboratoire de Photonique et de Nanostructures (LPN), Route de Nozay, 91460 Marcoussis, France.
authors: C
authors: C
authors: David
authors: CEA - Saclay, DSM/IRAMIS/SPCSI, 91191 Gif sur Yvette France.
authors: S
authors: S
authors: Latil
authors: Synchrotron-SOLEIL, Saint-Aubin, BP48, F91192 Gif sur Yvette Cedex, France.
authors: F
authors: F
authors: Sirotti
authors: CNRS- Laboratoire de Photonique et de Nanostructures (LPN), Route de Nozay, 91460 Marcoussis, France.
authors: A
authors: A
authors: Ouerghi