2017•Physical review. B./Physical review. BOpen access

Relationship between conductance fluctuation and weak localization in graphene

D. Terasawa, Akira Fukuda, Akira Fujimoto, Yasuhide Ohno, Yasushi Kanai, Kazuhiko Matsumoto

Abstract

The relationship between the universal conductance fluctuation and the weak localization effect in monolayer graphene is investigated. By comparing experimental results with the predictions of the weak localization theory for graphene, we find that the ratio of the elastic intervalley scattering time to the inelastic dephasing time varies in accordance with the conductance fluctuation; this is a clear evidence connecting the universal conductance fluctuation with the weak localization effect. We also find a series of scattering lengths that are related to the phase shifts caused by magnetic flux by Fourier analysis.

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Key concepts: Conductance, Weak localization, Dephasing, Graphene, Condensed matter physics, Scattering, Physics, Phase (matter)