Weak Localisation in Clean and Highly Disordered Graphene

We look at the magnetic field induced weak localisation peak of graphene samples with different mobilities. At very low temperatures, low mobility samples exhibit a very broad peak as a function of the magnetic field, in contrast to higher mobility samples, where the weak localisation peak is very s...

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Bibliographic Details
Published in:arXiv.org 2012-12
Main Authors: Hilke, Michael, Massicotte, Mathieu, Whiteway, Eric, Yu, Victor
Format: Article
Language:English
Subjects:
Coherence length
Dependence
Graphene
Localization
Magnetic fields
Phase coherence
Online Access:Get full text
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Summary:We look at the magnetic field induced weak localisation peak of graphene samples with different mobilities. At very low temperatures, low mobility samples exhibit a very broad peak as a function of the magnetic field, in contrast to higher mobility samples, where the weak localisation peak is very sharp. We analyze the experimental data in the context of the localisation length, which allows us to extract, both the localisation length and the phase coherence length of the samples, regardless of their mobilities. This analysis is made possible by the observation that the localisation length undergoes a generic weak localisation dependence with striking universal properties.
ISSN:2331-8422
DOI:10.48550/arxiv.1212.5337