Jump to main content
Jump to site search


Ab initio modelling of spin relaxation lengths in disordered graphene nanoribbons

Author affiliations

Abstract

The spin-dependent transport properties of armchair graphene nanoribbons in the presence of extrinsic spin–orbit coupling induced by a random distribution of nickel adatoms is studied. By combining a recursive Green's function formalism with density functional theory, we explore the influence of ribbon length and metal adatom concentration on the conductance. At a given length, we observed a significant enhancement of the spin-flip channel around resonances and at energies right above the Fermi level. We also estimate the spin-relaxation length, finding values on the order of tens of micrometers at low Ni adatom concentrations. This study is conducted at singular ribbon lengths entirely from fully ab initio methods, providing indirectly evidence that the Dyakonov–Perel spin relaxation mechanism might be the dominant at low concentrations as well as the observation of oscillations in the spin-polarization.

Graphical abstract: Ab initio modelling of spin relaxation lengths in disordered graphene nanoribbons

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Jul 2019, accepted on 21 Oct 2019 and first published on 21 Oct 2019


Article type: Paper
DOI: 10.1039/C9CP04054D
Phys. Chem. Chem. Phys., 2019, Advance Article

  •   Request permissions

    Ab initio modelling of spin relaxation lengths in disordered graphene nanoribbons

    W. Y. Rojas, C. E. P. Villegas and A. R. Rocha, Phys. Chem. Chem. Phys., 2019, Advance Article , DOI: 10.1039/C9CP04054D

Search articles by author

Spotlight

Advertisements