Uniformity of the pseudomagnetic field in strained graphene

Abstract

We present a study on the uniformity of the pseudomagnetic field in graphene as a function of the relative orientation between the graphene lattice and straining directions. For this, we strained a regular micron-sized graphene hexagon by deforming it symmetrically by displacing three of its edges. By simulations, we found that the pseudomagnetic field is strongest if the strain is applied perpendicular to the armchair direction of graphene. For a hexagon with a side length of 1 $\mu$m, the pseudomagnetic field has a maximum of 1.2 T for an applied strain of 3.5% and it is uniform (variance $<1$%) within a circle with a diameter of $\sim 520$ nm. This diameter is on the order of the typical diameter of the laser spot in a state-of-the-art confocal Raman spectroscopy setup, which suggests that observing the pseudomagnetic field in measurements of shifted magneto-phonon resonance is feasible.

7 pages, 5 figures

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• Zero-magnetic-field Hall effects in artificially corrugated bilayer graphene
• Pseudomagnetic fields and triaxial strain in graphene
• Tailoring mechanically-tunable strain fields in graphene
• Tunable Anomalous Andreev Reflection and Triplet Pairings in Spin Orbit Coupled Graphene
• Local versus extended deformed graphene geometries for valley filtering
• Electron dynamics in strained graphene
• Raman scattering of graphene based systems in high magnetic fields
• Fabrication of comb-drive actuators for straining nanostructured suspended graphene
• Electrical Control over Phonon Polarization in Strained Graphene
• Tight-binding Piezoelectric Theory and Electromechanical Coupling Correlations for Transition Metal Dichalcogenide Monolayers
• Triaxially strained suspended graphene for large-area pseudo-magnetic fields
• Interplay between nanometer-scale strain variations and externally applied strain in graphene
• Magnetic Phases in Periodically Rippled Graphene
• Transport through dynamic pseudo-gauge fields and snake states in a Corbino geometry
• Fermionic symmetry-protected topological state in strained graphene
• Electron localization in periodically strained graphene
• Pseudomagnetic fields and strain engineering: graphene on GaN nanowires