Fano Resonance and Orbital Filtering in Multiply Connected Carbon Nanotubes

Abstract

We investigate the electron transport in multiply connected metallic carbon nanotubes within the Landauer-Büttiker formalism. Quasibound states coupled to the incident ${\pi }^{\ast }$ states give rise to energy levels of different widths depending on the coupling strength. In particular, donorlike states originating from heptagonal rings are found to give a very narrow level. Interference between broad and narrow levels produces Fano-type resonant backscattering as well as resonant tunneling. Over a significantly wide energy range, almost perfect suppression of the conduction of ${\pi }^{\ast }$ electrons occurs, which may be regarded as filtering of particular electrons ($\pi$-pass filter).

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• Ab initio Study of Aspirin Adsorption on Single-walled Carbon and Carbon Nitride Nanotubes
• Resonant light scattering by optical solitons
• Quantum control of nonlinear thermoelectricity at the nanoscale
• Equilibrium structures of water molecules confined within a multiply connected carbon nanotube: a molecular dynamics study
• Electron transport in crossed nanotubes with point contact
• Electron orbital valves made of multiply connected armchair carbon nanotubes with mirror-reflection symmetry: tight-binding study