Analytic solution to pseudo-Landau levels in strongly bent graphene nanoribbons

Abstract

Nonuniform elastic strain is known to induce pseudo-Landau levels in Dirac materials. But these pseudo-Landau levels are hardly resolvable in an analytic fashion when the strain is strong, because of the emerging complicated space dependence in both the strain-modulated Fermi velocity and the strain-induced pseudomagnetic field. We analytically characterize the solution to the pseudo-Landau levels in experimentally accessible strongly bent graphene nanoribbons, by treating the effects of the nonuniform Fermi velocity and pseudomagnetic field on equal footing. The analytic solution is detectable through the angle-resolved photoemission spectroscopy (ARPES) and allows quantitative comparison between theories and various transport experiments, such as the Shubnikov-de Haas oscillation in the complete absence of magnetic fields and the negative strain-resistivity resulting from the valley anomaly. The analytic solution can be generalized to twisted two-dimensional materials and topological materials and will shed a new light on the related experimental explorations and straintronics applications.

arXiv comment18 pages, 10 figures

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• Strain-induced pseudo-magnetic field in $\alpha -{\mathcal{T}}_3$ lattice
• Entropy and Temperature in finite isolated quantum systems
• Pseudo-magnetic fields in square lattices
• Topological Superfluid Responses of Superconducting Dirac Semimetals
• A generalized framework for straintronics in 2D quantum materials using group theory
• Transport in strained graphene: Interplay of Abelian and axial magnetic fields
• Superfluid Stiffness and Josephson Quantum Capacitance: Adiabatic Approach and Topological Effects
• Quantum-Hall Spectroscopy of Elliptically Deformed Graphene Nanobubble Qubits