Resonant transport in Kekule-distorted graphene nanoribbons
arXiv:1910.10338 · doi:10.1063/1.5133091
Abstract
The formation of a superlattice in graphene can serve as a way to modify its electronic bandstructure and thus to engineer its electronic transport properties. Recent experiments have discovered a Kekulé bond ordering in graphene deposited on top of a Copper substrate, leading to the breaking of the valley degeneracy while preserving the highly desirable feature of linearity and gapless character of its band dispersion. In this paper we study the effects of a Kekulé distortion in zigzag graphene nanoribbons in both, the subband spectrum and on its electronic transport properties. We extend our study to investigate also the electronic conductance in graphene nanoribbons composed of sequentially ordered Kek-Y superlattice. We find interesting resonances in the conductance response emerging in the otherwise energy gap regions, which scales with the number of Kek-Y interfaces minus one. Such features resembles the physics of resonant tunneling behavior observed in semiconductors heterostructures. Our findings provide a possible way to measure the strenght of Kekulé parameter in graphene nanoribbons.
7 pages, 5 figures
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Cited by in corpus (12)
- Dynamical Floquet spectrum of Kekulé-distorted graphene under normal incidence of electromagnetic radiation
- Valley-driven Zitterbewegung in Kekulé-distorted graphene
- Dynamic polarization and plasmons in kekulé-patterned graphene: Signatures of the broken valley degeneracy
- Light-modulated Josephson effect in Kekulé patterned graphene
- Optoelectronic Fingerprints of Interference between Different Charge Carriers in Graphene Superlattices and Analogies to Twisted Graphene Bilayers
- Kekulé Induced Valley Birefringence and Skew Scattering in Graphene
- Electronic spectrum and optical properties of Y-shaped Kekule-patterned graphene: Band nesting resonance as an optical signature
- Emergence of Meron Kekulé lattices in twisted Néel antiferromagnets
- Strain- and doping-tunable optical resonance in Kekulé-Y graphene
- Floquet-Engineered Valley-Topotronics in Kekulé-Y Bond Textured Graphene Superlattice
- Floquet Control of Electron and Exciton Transport in Kekulé-Distorted Graphene
- Interplay of Kekulé distortions and laser fields in graphene