期刊
SOLID STATE COMMUNICATIONS
卷 152, 期 15, 页码 1283-1288出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2012.04.032
关键词
Graphene; Double layer; Coulomb drag; Quantum Hall
资金
- ONR
- NRI
- NSF [DMR-0819860]
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 ultrathin 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. (c) 2012 Elsevier Ltd. All rights reserved.
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