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Orbital magnetization of graphene and graphene nanoribbons

Journal Article


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Abstract


  • We present a quantitative analysis on orbital magnetization of graphene under a magnetic field. The

    energy spectra were obtained by solving Harper equation for a honeycomb lattice. The effect of the

    next-nearest-neighbor hopping(NNNH) is to increase the period of the magnetic subbands in f/f0

    from 1 to 6 (where f is the magnetic flux through a unit cell and f0 is the flux quanta). The shifts

    of the energy levels due to the NNNH vary with the magnetic field. The Holmholtz free energy at

    the points f/f0=6n+1 is lowered as compared to that with the nearest neighbor hopping only. For

    graphene nanoribbons, the magnetic susceptibility is very sensitive to the ribbon width and chirality.

    The zero-field susceptibility increase with the ribbon width.

UOW Authors


  •   Liu, Junfeng (external author)
  •   Ma, Zhongshui (external author)
  •   Wright, A R. (external author)
  •   Zhang, C

Publication Date


  • 2008

Citation


  • Liu, J., Ma, Z., Wright, A. R. & Zhang, C. (2008). Orbital magnetization of graphene and graphene nanoribbons. Journal of Applied Physics, 103 (10), 103711-1-103711-6.

Scopus Eid


  • 2-s2.0-44649103873

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=5693&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/2762

Start Page


  • 103711-1

End Page


  • 103711-6

Volume


  • 103

Issue


  • 10

Abstract


  • We present a quantitative analysis on orbital magnetization of graphene under a magnetic field. The

    energy spectra were obtained by solving Harper equation for a honeycomb lattice. The effect of the

    next-nearest-neighbor hopping(NNNH) is to increase the period of the magnetic subbands in f/f0

    from 1 to 6 (where f is the magnetic flux through a unit cell and f0 is the flux quanta). The shifts

    of the energy levels due to the NNNH vary with the magnetic field. The Holmholtz free energy at

    the points f/f0=6n+1 is lowered as compared to that with the nearest neighbor hopping only. For

    graphene nanoribbons, the magnetic susceptibility is very sensitive to the ribbon width and chirality.

    The zero-field susceptibility increase with the ribbon width.

UOW Authors


  •   Liu, Junfeng (external author)
  •   Ma, Zhongshui (external author)
  •   Wright, A R. (external author)
  •   Zhang, C

Publication Date


  • 2008

Citation


  • Liu, J., Ma, Z., Wright, A. R. & Zhang, C. (2008). Orbital magnetization of graphene and graphene nanoribbons. Journal of Applied Physics, 103 (10), 103711-1-103711-6.

Scopus Eid


  • 2-s2.0-44649103873

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=5693&context=engpapers

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/2762

Start Page


  • 103711-1

End Page


  • 103711-6

Volume


  • 103

Issue


  • 10