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Title: Magnetism induced by excess electrons trapped at diamagnetic edge-quantum well in multi-layer graphene

In this paper, we clarified a robust mechanism of magnetism generated by excess electrons captured by edge-quantum well of diamagnetic armchair edges. Consistency between density functional theory calculations and electron cyclotron resonance experiments verified that: (1) Multi-layer armchair nanoribbons are stable with proper amounts of excess electrons which can provide net spin; (2) Since under-coordination induces lattice relaxation and potential well modulation, electrons tend to be trapped at edges; and (3) Neither large amount of excess electrons nor positive charges can induce magnetism. This work shed light on the development of graphene devices in its magnetic applications.
Authors:
 [1] ;  [2] ; ;  [1] ;  [3]
  1. Institute of Nanosurface Science and Engineering, Shenzhen University, Shenzhen 518060 (China)
  2. (Singapore)
  3. NOVITAS, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798 (Singapore)
Publication Date:
OSTI Identifier:
22311203
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DENSITY FUNCTIONAL METHOD; ELECTRON CAPTURE; ELECTRON CYCLOTRON-RESONANCE; GRAPHENE; LAYERS; MAGNETISM; QUANTUM WELLS; RELAXATION; SPIN; TRAPPING; VISIBLE RADIATION