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The transport properties of a bilayer graphene are studied theoreticallywithin a self-consistent Born approximation. The electronic spectrum iscomposed of $k$-linear dispersion in the low-energy region and $k$-squaredispersion as in an ordinary two-dimensional metal at high energy, leading to acrossover between different behaviors in the conductivity on changing the Fermienergy or disorder strengths. We find that the conductivity approaches$2e^2/\pi^2\hbar$ per spin in the strong-disorder regime, independently of theshort- or long-range disorder.Comment: 8 pages, 5 figure

Transport in bilayer graphene: Calculations within a self-consistent Born approximation