Ramamoorthy, Harihara

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Ramamoorthy, Harihara
Alternative Name
Ramamoorthy, H.
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harihara.ra@kmitl.ac.th

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    Item type:Publication,
    Conductance fluctuations in graphene in the presence of long-range disorder
    (2016-03-04)
    Liu, Bobo
    ;
    Akis, Richard
    ;
    Ferry, David K.
    ;
    Bohra, Girish
    ;
    Somphonsane, Ratchanok
    The fluctuations in the conductance of graphene that arise from a long-range disorder potential induced by random impurities are investigated with an atomic tight-binding lattice. The screened impurities lead to a slow variation of the background potential and this varies the overall potential landscape as the Fermi energy or an applied magnetic field is varied. As a result, the phase interference varies randomly and leads to fluctuations in the conductance. Recently, experiments have shown that an applied magnetic field produces a remarkable reduction in the amplitude of these conductance fluctuations. We find qualitative agreement with these experiments, and it appears that the reduction in magnetic field of the fluctuations arises from a field induced smoothing of the conductance landscape.