Magnetoresistance and Magnetic Ordering Fingerprints in Hydrogenated Graphene

David Soriano, Nicolas Leconte, Pablo Ordejón, Jean-Christophe Charlier, Juan-Jose Palacios, and Stephan Roche
Phys. Rev. Lett. 107, 016602 – Published 30 June 2011

Abstract

Spin-dependent features in the conductivity of graphene, chemically modified by a random distribution of hydrogen adatoms, are explored theoretically. The spin effects are taken into account using a mean-field self-consistent Hubbard model derived from first-principles calculations. A Kubo transport methodology is used to compute the spin-dependent transport fingerprints of weakly hydrogenated graphene-based systems with realistic sizes. Conductivity responses are obtained for paramagnetic, antiferromagnetic, or ferromagnetic macroscopic states, constructed from the mean-field solutions obtained for small graphene supercells. Magnetoresistance signals up to 7% are calculated for hydrogen densities around 0.25%. These theoretical results could serve as guidance for experimental observation of induced magnetism in graphene.

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  • Received 20 January 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.016602

© 2011 American Physical Society

Authors & Affiliations

David Soriano1,2, Nicolas Leconte3, Pablo Ordejón4, Jean-Christophe Charlier3, Juan-Jose Palacios5, and Stephan Roche6,7

  • 1Departamento de Física Aplicada, Universidad de Alicante, San Vicente del Raspeig, Alicante 03690, Spain
  • 2Instituto de Ciencia de Materiales de Madrid (CSIC), Cantoblanco, Madrid, 28049, Spain
  • 3Université Catholique de Louvain, Institute of Condensed Matter and Nanoscience (IMCN), Place Croix du Sud 1 (NAPS-Boltzmann), 1348 Louvain-la-Neuve, Belgium
  • 4CIN2 (CSIC-ICN) Barcelona, Campus Universitat Autonoma de Barcelona, E-08193 Bellaterra, Spain
  • 5Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
  • 6CIN2 (ICN-CSIC) and Universitat Autonoma de Barcelona, Catalan Institute of Nanotechnology, Campus de la UAB, 08193 Bellaterra (Barcelona), Spain
  • 7ICREA, Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain

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Issue

Vol. 107, Iss. 1 — 1 July 2011

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