Phys. Rev. Lett. 98, 176805 (2007) [4 pages]Weak Localization in Bilayer Graphene
We have performed the first experimental investigation of quantum interference corrections to the conductivity of a bilayer graphene structure. A negative magnetoresistance—a signature of weak localization—is observed at different carrier densities, including the electroneutrality region. It is very different, however, from the weak localization in conventional two-dimensional systems. We show that it is controlled not only by the dephasing time, but also by different elastic processes that break the effective time-reversal symmetry and provide intervalley scattering. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.176805
DOI:
10.1103/PhysRevLett.98.176805
PACS:
73.23.−b, 72.15.Rn, 73.43.Qt
See AlsoSee Also: K. Kechedzhi, Vladimir I. Fal’ko, E. McCann, and B. L. Altshuler, Influence of Trigonal Warping on Interference Effects in Bilayer Graphene, Phys. Rev. Lett. 98, 176806 (2007). |
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