Perfect valley filter controlled by Fermi velocity modulation in graphene
arXiv:2001.02862 · doi:10.1016/j.carbon.2020.01.031
Abstract
In this work we investigate the effects of a Fermi velocity modulation in a valley filter in graphene created by a combination of a magnetic and electric barrier. With the effective Dirac equation of the system, we use the transfer matrix formalism to obtain the transmittance. We verify that the valley transport in graphene is very sensitive to a Fermi velocity modulation, which is able to choose which valley will be filtered with perfect filtering. Also, it is possible to use a Fermi velocity modulation to filter both valleys or to make the valley filter transparent. It reveals that the Fermi velocity is a powerful tool that can be used to tune a graphene valley filter, since it has a total control in its transport properties.
References in corpus (45)
- Electric Field Effect in Atomically Thin Carbon Films
- The electronic properties of graphene
- Chiral tunneling and the Klein paradox in graphene
- Substrate-induced band gap opening in epitaxial graphene
- Valley contrasting physics in graphene: magnetic moment and topological transport
- Valley filter and valley valve in graphene
- Substrate-induced bandgap in graphene on hexagonal boron nitride
- Electron-Electron Interactions in Graphene: Current Status and Perspectives
- All-graphene integrated circuits via strain engineering
- Dirac cones reshaped by interaction effects in suspended graphene
- Detecting Topological Currents in Graphene Superlattices
- Graphene valley filter using a line defect
- Weak localisation in graphene flakes
- Magnetic confinement of massless Dirac fermions in graphene
- Generation and detection of pure valley current by electrically induced Berry curvature in bilayer graphene
- Fermi velocity engineering in graphene by substrate modification
- Gate-tunable Topological Valley Transport in Bilayer Graphene
- Strain-induced pseudo-magnetic field for novel graphene electronics
- Valley-dependent Brewster angles and Goos-Hanchen effect in strained graphene
- Generation of pure bulk valley current in graphene
- Valley filter in strain engineered graphene
- Dirac Fermion Confinement in Graphene
- Controlled Growth of a Line Defect in Graphene and Implications for Gate-Tunable Valley Filtering
- Growth and Electronic Structure of Boron-Doped Graphene
- Velocity-modulation control of electron-wave propagation in graphene
- Valley separation in graphene by polarized light
- Quantized Landau level spectrum and its density dependence
- Observation of the quantum valley Hall state in ballistic graphene superlattices
- Transport properties of graphene across strain-induced nonuniform velocity profiles
- A controllable valley polarization in Graphene
- Scattering in one-dimensional heterostructures described by the Dirac equation
- Strain controlled valley filtering in multi-terminal graphene structures
- Controlling the energy gap of graphene by Fermi velocity engineering
- Valley filtering and electronic optics using polycrystalline graphene
- Probing of valley polarization in graphene via optical second-harmonic generation
- A scheme to realize the quantum spin-valley Hall effect in monolayer graphene
- Valley polarized transport in strained graphene based Corbino disc
- Perfect valley filter in strained graphene with single barrier region
- Valley Seebeck effect in gate tunable zigzag graphene nanoribbons
- Indirect band gap in graphene from modulation of the Fermi velocity
- Tuning the Fano factor of graphene via Fermi velocity modulation
- Electronic structure of a graphene superlattice with a modulated Fermi velocity
- Valley filter from magneto-tunneling between single and bi-layer graphene
- Electric field-induced valley degeneracy lifting in uniaxial strained graphene: evidence from magnetophonon resonance
- Control over band structure and tunneling in Bilayer Graphene induced by velocity engineering
Cited by in corpus (6)
- Magnetic Fabry-Pérot interferometer for valley filtering in a honeycomb-dice model
- Effects of Fermi velocity engineering in magnetic graphene superlattices
- Charge-pseudospin coupled diffusion in semi-Dirac graphene: pseudospin assisted valley transport
- Switching valley filtered current directions in multi-terminal graphene systems
- Weyl Semimetal Path to Valley Filtering in Graphene
- Valley to charge current conversion in graphene grain boundaries