Graphene nanodrums as valleytronic devices

Abstract

We investigate the electronic transport in graphene nanoelectromechanical resonators (GrNEMS), known also as graphene nanodrums or nanomembranes. We demonstrate that these devices, despite small values of out-of-plane strain, between $0.1$ and $1\%$, can be used as efficient and robust valley polarizers and filters. Their working principle is based on the pseudomagnetic field generated by the strain of the graphene membrane. They work for ballistic electron beams as well as for strongly dispersed ones and can be also used as electron beam collimators due to the focusing effect of the pseudomagnetic field. We show additionally that the current flow can be estimated by semiclassical trajectories which represent a computationally efficient tool for predicting the functionality of the devices.

arXiv comment11 pages, 10 figures

References in corpus (43)

• The electronic properties of graphene
• Energy gaps, topological insulator state and zero-field quantum Hall effect in graphene by strain engineering
• A tight-binding approach to uniaxial strain in graphene
• Gauge fields in graphene
• Performance of Monolayer Graphene Nanomechanical Resonators with Electrical Readout
• Electronic and optical properties of strained graphene and other strained 2D materials: a review
• Graphene mechanical oscillators with tunable frequency
• Space dependent Fermi velocity in strained graphene
• Strained graphene: tight-binding and density functional calculations
• Continuum elastic modeling of graphene resonators
• Dynamical strong coupling and parametric amplification in mechanical modes of graphene drums
• Mechanics of freely-suspended ultrathin layered materials
• Graphene Nanobubbles as Valley Filters and Beamsplitters
• Nanoelectromechanical Sensors based on Suspended 2D Materials
• Tunable phonon cavity coupling in graphene membranes
• Gauge fields from strain in graphene
• Piezoresistive Properties of Suspended Graphene Membranes under Uniaxial and Biaxial Strain in Nanoelectromechanical Pressure Sensors
• Light-Induced Valleytronics in Pristine Graphene
• Tuning the pseudospin polarization of graphene by a pseudo-magnetic field
• Radio frequency electrical transduction of graphene mechanical resonators
• Visualizing the motion of graphene nanodrums
• Generalizing the Fermi velocity of strained graphene from uniform to nonuniform strain
• Current splitting and valley polarization in elastically deformed graphene
• Room temperature strain-induced Landau levels in graphene on a wafer-scale platform
• Current flow paths in deformed graphene: from quantum transport to classical trajectories in curved space
• Strained fold assisted transport in graphene systems
• SU-8 clamped CVD graphene drum resonators
• Synthetic electric fields and phonon damping in carbon nanotubes and graphene
• Strain controlled valley filtering in multi-terminal graphene structures
• Frequency tuning, nonlinearities and mode coupling in circular graphene resonators
• Local versus extended deformed graphene geometries for valley filtering
• Electron optics in phosphorene pn junctions: Negative reflection and anti super-Klein tunneling
• Preparing local strain patterns in graphene by atomic force microscope based indentation
• Quantum Hall response to time-dependent strain gradients in graphene
• Valley polarization braiding in strained graphene
• Vibrational modes of ultrathin carbon nanomembrane mechanical resonators
• Valley notch filter in a graphene strain superlattice: Green's function and machine learning approach
• Enhanced asymmetric valley scattering by scalar fields in non-uniform out-of-plane deformations in graphene
• Spatially Resolved Optical Excitation of Mechanical Modes in Graphene NEMS
• Gradient-index electron optics in graphene pn junctions
• Phosphorene pnp junctions as perfect electron waveguides
• Valley current generation using biased bilayer graphene dots
• Emergence of strain-induced moiré patterns and pseudo-magnetic field confined states in graphene

Cited by in corpus (6)

• Tunable valley filtering in dynamically strained $\alpha$-${\mathcal{T}}_3$ lattices
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• Absence of edge states at armchair edges in inhomogeneously strained graphene under a pseudomagnetic field
• Origins of Valley Current Reversal in Partially Overlapped Graphene Layers
• Thermoelectric transport in graphene under strain fields modeled by Dirac oscillators
• Tunnel Valley Current Filter in the Partially Overlapped Graphene under the Vertical Electric Field