Capacitance of graphene bilayer as a probe of layer-specific properties
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Young-2011-Capacitance of graphene bilayer.pdf
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Author(s)
Levitov, Leonid
Young, Andrea F.
Date Issued
August 2011
Journal
Physical Review B
Publisher
American Physical Society (APS)
Citation
Young, Andrea F., and Leonid S. Levitov. “Capacitance of graphene bilayer as a probe of layer-specific properties.” Physical Review B 84.8 (2011): n. pag. Web. 26 Jan. 2012.
© 2011 American Physical Society
Version
Final published version
Abstract
The unique capabilities of capacitance measurements in bilayer graphene enable probing of layer-specific properties that are normally out of reach in transport measurements. Furthermore, capacitance measurements in the top-gate and penetration field geometries are sensitive to different physical quantities: The penetration field capacitance probes the two layers equally, whereas the top-gate capacitance preferentially samples the near layer, resulting in the "near-layer capacitance enhancement" effect observed in recent top-gate capacitance measurements. We present a detailed theoretical description of this effect and show that capacitance can be used to determine the equilibrium layer polarization, a potentially useful tool in the study of broken symmetry states in graphene, stemming from the interplay between interlayer screening, disorder, and the inverse-square-root van Hove singularity particular to the bilayer graphene band structure. We show how capacitance experiments can be used to probe the ground-state layer polarization, a potentially useful tool in the study of broken symmetry states in graphene.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.84.085441
