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Title: First-principles study of carrier-induced ferromagnetism in bilayer and multilayer zigzag graphene nanoribbons

We studied magnetism in bilayer and multilayer zigzag graphene nanoribbons (ZGNRs) through first-principles density functional theory calculations. We found that the magnetic ground state of bilayer ZGNRs is the C-type antiferromagnetic (AFM) state, which is the AFM order between intraplane-edge carbon atoms and ferromagnetic (FM) order between interplane edge carbon atoms. In the cases of infinitely stacked multilayer ZGNRs, i.e., zigzag graphite nanoribbons, the C-type AFM state is also the most stable. By carrier doping, we found that the magnetic ground state changed from the C-AFM state to the FM state and, thus, realized two-dimensional FM surface (edge) states of graphite with a metallic conductivity.
Authors:
 [1] ;  [2] ;  [2] ;  [3]
  1. Department of Applied Physics, The University of Tokyo, Hongo, Tokyo 113-8656 (Japan)
  2. Faculty of Mathematics and Physics, Institute of Science and Engineering, Kanazawa University, Kanazawa 920-1192 (Japan)
  3. (Japan)
Publication Date:
OSTI Identifier:
22261584
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANTIFERROMAGNETISM; ATOMIC FORCE MICROSCOPY; DENSITY FUNCTIONAL METHOD; FERROMAGNETISM; GRAPHENE; GRAPHITE; GROUND STATES; NANOSTRUCTURES