Coulomb Drag and Magnetotransport in Graphene Double Layers

We review the fabrication and key transport properties of graphene double layers, consisting of two graphene monolayers placed in close proximity, independently contacted, and separated by an ultra-thin dielectric. We outline a simple band structure model relating the layer densities to the applied...

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Bibliographic Details
Published inarXiv.org
Main Authors Kim, Seyoung, Tutuc, Emanuel
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 13.06.2012
Subjects
Drag
Graphene
High temperature
Physics - Mesoscale and Nanoscale Physics
Transport properties
Variations
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Summary:We review the fabrication and key transport properties of graphene double layers, consisting of two graphene monolayers placed in close proximity, independently contacted, and separated by an ultra-thin dielectric. We outline a simple band structure model relating the layer densities to the applied gate and inter-layer biases, and show that calculations and experimental results are in excellent agreement both at zero and in high magnetic fields. Coulomb drag measurements, which probe the electron-electron scattering between the two layers reveal two distinct regime: (i) diffusive drag at elevated temperatures, and (ii) mesoscopic fluctuation-dominated drag at low temperatures. We discuss the Coulomb drag results within the framework of existing theories.
ISSN:2331-8422
DOI:10.48550/arxiv.1206.2854