Nanofaceting as a stamp for periodic graphene charge carrier modulations
arXiv:1604.00471 · doi:10.1038/srep23663
Abstract
The exceptional electronic properties of monoatomic thin graphene sheets triggered numerous original transport concepts, pushing quantum physics into the realm of device technology for electronics, optoelectronics and thermoelectrics. At the conceptual pivot point is the particular twodimensional massless Dirac fermion character of graphene charge carriers and its volitional modification by intrinsic or extrinsic means. Here, interfaces between different electronic and structural graphene modifications promise exciting physics and functionality, in particular when fabricated with atomic precision. In this study we show that quasiperiodic modulations of doping levels can be imprinted down to the nanoscale in monolayer graphene sheets. Vicinal copper surfaces allow to alternate graphene carrier densities by several 10^13 carriers per cm^2 along a specific copper high-symmetry direction. The process is triggered by a self-assembled copper faceting process during high-temperature graphene chemical vapor deposition, which defines interfaces between different graphene doping levels at the atomic level.
References in corpus (15)
- The electronic properties of graphene
- Chiral tunneling and the Klein paradox in graphene
- Imaging Grains and Grain Boundaries in Single-Layer Graphene: An Atomic Patchwork Quilt
- Quantum interference and Klein tunneling in graphene heterojunctions
- Veselago Lens for Electrons: Focusing and Caustics in Graphene p-n Junctions
- Electronic transport in polycrystalline graphene
- Anisotropic behaviors of massless Dirac fermions in graphene under periodic potential
- Room-temperature ferromagnetism in graphite driven by 2D networks of point defects
- Klein tunneling in graphene: optics with massless electrons
- Electronic structure of graphene on single crystal copper substrates
- In-plane orientation effects on the electronic structure, stability and Raman scattering of monolayer graphene on Ir(111)
- Contact resistance and shot noise in graphene transistors
- Suppression of Multilayer Graphene Patches during CVD Graphene growth on Copper
- Graphene Induced Surface Reconstruction of Cu
- Temperature dependence of a graphene growth on a stepped iridium surface