Weak localisation in graphene flakes

Details Weak localisation in graphene flakes Weak localisation in graphene flakes

2007-07-02

arxiv.org/abs/0707.0140v2

Phys. Rev. Lett. 100, 056802 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Article and Supplementary material, Phys.Rev.Lett. (in print)

Scientific paper

10.1103/PhysRevLett.100.056802

We show that the manifestation of quantum interference in graphene is very different from that in conventional two-dimensional systems. Due to the chiral nature of charge carriers, it is sensitive not only to inelastic, phase-breaking scattering, but also to a number of elastic scattering processes. We study weak localization in different samples and at different carrier densities, including the Dirac region, and find the characteristic rates that determine it. We show how the shape and quality of graphene flakes affect the values of the elastic and inelastic rates and discuss their physical origin.

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