Strong current in carbon nanoconductors: Mechanical and magnetic stability

S. Leitherer, N. Papior, M. Brandbyge*

*Corresponding author for this work

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Abstract

Carbon nanoconductors are known to have extraordinary mechanical strength and interesting magnetic properties. Moreover, nanoconductors based on one- or two-dimensional carbon allotropes display a very high current-carrying capacity and ballistic transport. Here, we employ a recent, simple approach based on density functional theory to analyze the impact of strong current on the mechanical and magnetic properties of carbon nanoconductors. We find that the influence of the current itself on the bond-strength of carbon in general is remarkably low compared to e.g. typical metals. This is demonstrated for carbon chains, carbon nanotubes, graphene and polyacetylene. We can trace this to the strong binding and electronic bandstructure. On the other hand, we find that the current significantly change the magnetic properties. In particular, we find that currents in graphene zig-zag edge states quench the magnetism.

Original languageEnglish
Article number119708
JournalCarbon
Volume232
Number of pages6
ISSN0008-6223
DOIs
Publication statusPublished - 2025

Keywords

  • Carbon magnetism
  • Carbon nanoconductors
  • Current-induced effects
  • Density functional theory
  • Electro-migration
  • First principles calculations

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