Kun Shan University Institutional Repository:Item 987654321/9491
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    题名: Magnetoconductance of graphene nanoribbons
    作者: 李道聖
    T.S. Lia
    Y.C. Huang
    S.C. Changa
    C.P. Chang
    M.F. Lin
    贡献者: 電機工程系
    关键词: transport properties
    electronic properties;graphene nanoribbon
    日期: 2009-12-21
    上传时间: 2010-03-22 16:29:34 (UTC+8)
    摘要: The electronic and transport properties of monolayer and AB-stacked bilayer
    zigzag graphene nanoribbons subject to the influences of a magnetic field are
    investigated theoretically. We demonstrate that the magnetic confinement and the
    size effect affect the electronic properties competitively. In the limit of a strong
    magnetic field, the magnetic length is much smaller than the ribbon width, and
    the bulk electrons are confined solely by the magnetic potential. Their properties
    are independent of the width, and the Landau levels appear. On the other hand,
    the size effect dominates in the case of narrow ribbons. In addition, the dispersion
    relations rely sensitively on the interlayer interactions. Such interactions will
    modify the subband curvature, create additional band-edge states, change the
    subband spacing or the energy gap, and separate the partial flat bands. The band
    structures are symmetric or asymmetric about the Fermi energy for monolayer or
    bilayer nanoribbons, respectively. The chemical-potential-dependent electrical
    and thermal conductance exhibits a stepwise increase behaviour. The competition
    between the magnetic confinement and the size effect will also be reflected in the
    transport properties. The features of the conductance are found to be strongly
    dependent on the field strength, number of layers, interlayer interactions, and
    關聯: Philosophical Magazine Vol. 89, No. 8, 11 March 2009, 697–709
    显示于类别:[電機工程系所] 期刊論文


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