%0 Journal Article
%T The effect of electron dielectric response on the quantum capacitance of graphene in a strong magnetic field
%A Brian Skinner
%A G. L. Yu
%A A. V. Kretinin
%A A. K. Geim
%A K. S. Novoselov
%A B. I. Shklovskii
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevB.88.155417
%X The quantum capacitance of graphene can be negative when the graphene is placed in a strong magnetic field, which is a clear experimental signature of positional correlations between electrons. Here we show that the quantum capacitance of graphene is also strongly affected by its dielectric polarizability, which in a magnetic field is wave vector-dependent. We study this effect both theoretically and experimentally. We develop a theory and numerical procedure for accounting for the graphene dielectric response, and we present measurements of the quantum capacitance of high-quality graphene capacitors on boron nitride. Theory and experiment are found to be in good agreement.
%U http://arxiv.org/abs/1307.2257v1