Strain-induced pseudo-magnetic fields and charging effects on CVD-grown graphene
arXiv:1009.0081 · doi:10.1016/j.susc.2011.03.025
Abstract
Atomically resolved imaging and spectroscopic characteristics of graphene grown by chemical vapor deposition (CVD) on copper are investigated by means of scanning tunneling microscopy and spectroscopy (STM/STS). For CVD-grown graphene remaining on the copper substrate, the monolayer carbon structures exhibit ripples and appear strongly strained, with different regions exhibiting different lattice structures and electronic density of states (DOS). In particular, ridges appear along the boundaries of different lattice structures, which exhibit excess charging effects. Additionally, the large and non-uniform strain induces pseudo-magnetic field up to ~ 50 Tesla, as manifested by the integer and fractional pseudo-magnetic field quantum Hall effect (IQHE and FQHE) in the DOS of graphene. In contrast, for graphene transferred from copper to SiO2 substrates after the CVD growth, the average strain on the whole is reduced, so are the corresponding charging effects and pseudo-magnetic fields except for sample areas near topographical ridges. These findings suggest feasible "strain engineering" of the electronic states of graphene by proper design of the substrates and growth conditions.
arXiv comment10 pages, 9 figures. Accepted for publication in a special issue of Surface Science: "Graphene Surfaces and Interfaces". Contac author: Nai-Chang Yeh ([email protected])
References in corpus (19)
- The electronic properties of graphene
- Two-Dimensional Gas of Massless Dirac Fermions in Graphene
- Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
- Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils
- Quantum Spin Hall Effect in Graphene
- Energy Gaps in Graphene Nanoribbons
- Electronic spin transport and spin precession in single graphene layers at room temperature
- Topological invariants of time-reversal-invariant band structures
- Quantum Spin Hall Effect
- Landau level degeneracy and quantum Hall effect in a graphite bilayer
- Unconventional quantum Hall effect and Berry's phase of 2pi in bilayer graphene
- Energy gaps, topological insulator state and zero-field quantum Hall effect in graphene by strain engineering
- Asymmetry gap in the electronic band structure of bilayer graphene
- Phase Coherent Transport of Charges in Graphene Quantum Billiard
- Periodically rippled graphene: growth and spatially resolved electronic structure
- Midgap states and charge inhomogeneities in corrugated graphene
- Generating quantizing pseudomagnetic fields by bending graphene ribbons
- Symmetry-based approach to electron-phonon interactions in graphene
- Evidence for Strain-Induced Local Conductance Modulations in Single-Layer Graphene on SiO2
Cited by in corpus (29)
- Electronic and optical properties of strained graphene and other strained 2D materials: a review
- Novel effects of strains in graphene and other two dimensional materials
- Single-step deposition of high-mobility graphene at reduced temperatures
- Strain-induced pseudomagnetic field in Dirac semimetal borophene
- Gauge fields from strain in graphene
- Nanoscale Strain Engineering of Giant Pseudo-Magnetic Fields, Valley Polarization and Topological Channels in Graphene
- Aharonov-Bohm interferences from local deformations in graphene
- Superconducting States in pseudo-Landau Levels of Strained Graphene
- Lattice-corrected strain-induced vector potentials in graphene
- Pseudomagnetic fields in graphene nanobubbles of constrained geometry: A molecular dynamics study
- Interaction-driven topological insulator states in strained graphene
- Dispersive Landau levels and valley currents in strained graphene nanoribbons
- Mechanical Control of Graphene on Engineered Pyramidal Strain Arrays
- Gauge fields in graphene with nonuniform elastic deformations: A quantum field theory approach
- Measurement of Filling-Factor-Dependent Magnetophonon Resonances in Graphene Using Raman Spectroscopy
- Conductance across strain junctions in graphene nanoribbons
- Landau Levels in Uniaxially Strained Graphene: A Geometrical Approach
- Raise and collapse of strain-induced pseudo-Landau levels in graphene
- Nano-scale strain engineering of graphene and graphene-based devices
- Effective magnetic field induced by inhomogeneous Fermi velocity in strained honeycomb structures
- Analytic solution to pseudo-Landau levels in strongly bent graphene nanoribbons
- Landau levels in curved space realized in strained graphene
- Fractional Josephson effect in nonuniformly strained graphene
- Damping of Landau levels in neutral graphene at low magnetic fields: A phonon Raman scattering study
- Andreev reflection in edge states of time reversal invariant Landau levels
- Pseudo Landau levels, negative strain resistivity, and enhanced thermopower in twisted graphene nanoribbons
- New supercurrent pattern in quantum point contact with strained graphene nanoribbon
- Graphene as a quantum surface with curvature-strain preserving dynamics
- Flux-induced midgap states between strain-engineered flat bands