Mesoscopic conductance fluctuations in graphene

Horsell, D. W. and Savchenko, A. K. and Tikhonenko, F. V. and Kechedzhi, K. and Lerner, I. V. and Falko, Vladimir (2009) Mesoscopic conductance fluctuations in graphene. Solid State Communications, 149 (27-28). pp. 1041-1045. ISSN 0038-1098

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We study fluctuations of the conductance of micron-sized graphene devices as a function of the Fermi energy and magnetic field. The fluctuations are studied in combination with analysis of weak localization which is determined by the same scattering mechanisms. It is shown that the variance of conductance fluctuations depends not only on inelastic scattering that controls dephasing but also on elastic scattering. In particular, contrary to its effect on weak localization, strong intervalley scattering suppresses conductance fluctuations in graphene. The correlation energy, however, is independent of the details of elastic scattering and can be used to determine the electron temperature of graphene structures. (C) 2009 Elsevier Ltd. All rights reserved.

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Solid State Communications
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16 Aug 2012 11:15
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21 Nov 2022 22:42