Electronic transport in metallic carbon nanotubes with mixed defects within the strong localization regime
Fabian Teichert, Andreas Zienert, J\"org Schuster, Michael Schreiber
TL;DR
This paper investigates electron transport in metallic carbon nanotubes with various mixed defects, demonstrating a method to estimate conductance efficiently in the strong localization regime using localization length relationships.
Contribution
It introduces a weighted harmonic average approach to relate localization lengths of CNTs with mixed defects to those with identical defects, enabling faster conductance estimation.
Findings
Localization length with mixed defects can be predicted from individual defect types.
The proposed method accurately estimates conductance without extensive simulations.
Transport in defective CNTs is confirmed to be in the strong localization regime.
Abstract
We study the electron transport in metallic carbon nanotubes (CNTs) with realistic defects of different types. We focus on large CNTs with many defects in the mesoscopic range. In a recent paper we demonstrated that the electronic transport in those defective CNTs is in the regime of strong localization. We verify by quantum transport simulations that the localization length of CNTs with defects of mixed types can be related to the localization lengths of CNTs with identical defects by taking the weighted harmonic average. Secondly, we show how to use this result to estimate the conductance of arbitrary defective CNTs, avoiding time consuming transport calculations.
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