Abstract
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A Hall resistivity formula for the 2DES in graphene is derived from the zero-mass Dirac field model
adopting the electron reservoir hypothesis. The formula reproduces perfectly the experimental resistivity
data [K.S. Novoselov, et al., Nature 438 (2005) 201]. This perfect agreement cannot be achieved by any
other existing models. The electron reservoir is shown to be the 2DES itself.