Magnetism-dependent transport phenomena in hydrogenated graphene: From spin-splitting to localization effects

Nicolas Leconte, David Soriano, Stephan Roche, Pablo Ordejon, Jean Christophe Charlier, J. J. Palacios

Research output: Contribution to journalArticleResearchpeer-review

38 Citations (Scopus)

Abstract

Spin-dependent transport in hydrogenated two-dimensional graphene is explored theoretically. Adsorbed atomic hydrogen impurities can either induce a local antiferromagnetic, ferromagnetic, or nonmagnetic state depending on their density and relative distribution. To describe the various magnetic possibilities of hydrogenated graphene, a self-consistent Hubbard Hamiltonian, optimized by ab initio calculations, is first solved in the mean field approximation for small graphene cells. Then, an efficient order N Kubo transport methodology is implemented, enabling large scale simulations of functionalized graphene. Depending on the underlying intrinsic magnetic ordering of hydrogen-induced spins, remarkably different transport features are predicted for the same impurity concentration. Indeed, while the disordered nonmagnetic graphene system exhibits a transition from diffusive to localization regimes, the intrinsic ferromagnetic state exhibits unprecedented robustness toward quantum interference, maintaining, for certain resonant energies, a quasiballistic regime up to the micrometer scale. Consequently, low temperature transport measurements could unveil the presence of a magnetic state in weakly hydrogenated graphene. © 2011 American Chemical Society.
Original languageEnglish
Pages (from-to)3987-3992
JournalACS Nano
Volume5
Issue number5
DOIs
Publication statusPublished - 24 May 2011

Keywords

  • Ballistic transport
  • Disordered graphene
  • Graphene spintronics
  • Hydrogenation
  • Metal insulator transition
  • Numerical simulation
  • Quantum transport

Fingerprint Dive into the research topics of 'Magnetism-dependent transport phenomena in hydrogenated graphene: From spin-splitting to localization effects'. Together they form a unique fingerprint.

  • Cite this

    Leconte, N., Soriano, D., Roche, S., Ordejon, P., Charlier, J. C., & Palacios, J. J. (2011). Magnetism-dependent transport phenomena in hydrogenated graphene: From spin-splitting to localization effects. ACS Nano, 5(5), 3987-3992. https://doi.org/10.1021/nn200558d