Friday, July 5, 2013

1307.1457 (E. S. Sadki et al.)

Temperature Dependence of the Electrical Transport Properties of
Multilayer Graphene
   [PDF]

E. S. Sadki, H. Okazaki, T. Watanabe, T. Yamaguchi, Y. Takano
Multilayer graphene (MLG) thin films are deposited on silicon oxide substrates by mechanical exfoliation (or 'scotch-tape method') from Kish graphite. The thickness and number of layers are determined from both Atomic Force Microscopy (AFM) and Raman Spectroscopy. Electrical terminals are deposited on MLGs in a four-probe configuration by electron-beam lithography, gold/titanium thermal evaporation, and lift-off. The electrical resistance is measured from room temperature down to 2 K. The electrical resistance of the MLGs shows an increase with decreasing temperature, and then decreases after reaching a maximum value. These results are compared with recent experimental and theoretical data from the literature.
View original: http://arxiv.org/abs/1307.1457

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