Quantum localization and electronic transport in covalently functionalized carbon nanotubes
arXiv:1908.00952 · doi:10.1088/1361-648X/ab5a2d
Abstract
Carbon nanotubes are of central importance for applications in nano-electronics thanks to their exceptional transport properties. They can be used as sensors, for example in biological applications, provided that they are functionalized to detect specific molecules. Due to their one-dimensional geometry the carbon nanotubes are very sensitive to the phenomenon of Anderson localization and it is therefore essential to know how the functionalization modifies their conduction properties and if they remain good conductors. Here we present a study of the quantum localization induced by functionalization in metallic single walled carbon nanotubes (SWCNT) with circumferences up to . We consider resonant and non-resonant adsorbates that represent two types of covalently functionalized groups with moderate and strong scattering properties. The present study provides a detailed analysis of the localization behaviour and shows that the localization length can decrease down to at concentrations of about 1 percent of adsorbates. On this basis we discuss the possible electronic transport mechanisms which can be either metallic like or insulating like with variable range hopping.
References in corpus (15)
- Random-Matrix Theory of Quantum Transport
- Disorder, pseudospins, and backscattering in carbon nanotubes
- Tuning the conductance of single-walled carbon nanotubes by ion irradiation in the Anderson localization regime
- Modeling disorder in graphene
- Quantum dynamics in two and three-dimensional quasiperiodic tilings
- Conductivity of graphene with resonant and non-resonant adsorbates
- Anderson localization in two-dimensional graphene with short-range disorder: One-parameter scaling and finite-size effects
- A new formalism for the computation of RKKY interaction in aperiodic systems
- Hopping Conduction in Disordered Carbon Nanotubes
- Efficient linear-scaling quantum transport calculations on graphics processing units and applications on electron transport in graphene
- Obtaining localization properties efficiently using the Kubo-Greenwood formalism
- Electronic transport in metallic carbon nanotubes with mixed defects within the strong localization regime
- Strong localization in defective carbon nanotubes: a recursive Green's function study
- Numerical analysis of electronic conductivity in graphene with resonant adsorbates: comparison of monolayer and Bernal bilayer
- Mobility gap and quantum transport in functionalized graphene bilayer