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Title: Tensile strain-induced magnetism transition in multilayer graphene with excess electrons: Stability of the edge-quantum well

The stability of edge-quantum well-induced strong magnetism of multilayer armchair graphene nanoribbon (AGNR) with excess electrons was investigated under applied tensile strain by density functional theory (DFT) calculations. The results indicated that: (1) The strain along the armchair edge direction led to a transition of the multilayer AGNRs from ferromagnetic state to nonmagnetic state when the strain increased to a critical value; (2) The strain induced bond length changes reduced the stability of the edge-quantum well in terms of the reduction of the electrons capturing capacity; and (3) The spin splitting of the energy bands near the Fermi level reduced with the increase of the strain, resulting in the decrease of the spin moment. This finding suggests that the magnetic properties of graphene have strong dependence on its strain states, which is crucial to the design of graphene-based magnetic devices.
Authors:
 [1] ;  [2]
  1. Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, School of Mechanical Engineering, Xi’an Jiaotong University, Xi’an 710049 (China)
  2. Institute of Nanosurface Science and Engineering (INSE), Shenzhen University, Shenzhen 518060 (China)
Publication Date:
OSTI Identifier:
22492217
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 12; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; BOND LENGTHS; DENSITY FUNCTIONAL METHOD; ELECTRON CAPTURE; ELECTRONS; FERMI LEVEL; GRAPHENE; LAYERS; MAGNETIC PROPERTIES; MAGNETISM; QUANTUM WELLS; SPIN; STABILITY; STRAINS