Electronic compressibility of graphene: The case of vanishing electron correlations and the role of chirality

Abstract

A recent surprising finding that electronic compressibility measured experimentally in monolayer graphene can be described solely in terms of the kinetic energy [J. Martin, et al., Nat. Phys. 4, 144 (2008)] is explained theoretically as a direct consequence of the linear energy dispersion and the chirality of massless Dirac electrons. For bilayer graphene we show that contributions to the compressibility from the electron correlations are restored. We attribute the difference to the respective momentum dependence of the low energy band structures of the two materials.

Four pages. Published version. Journal reference is Physical Review B 80, 081408(R) (2009)

References in corpus (8)

• Electric Field Effect in Atomically Thin Carbon Films
• The Role of Electron-electron Interactions in Graphene ARPES Spectra
• Coulomb interaction, ripples, and the minimal conductivity of graphene
• Chirality and Correlations in Graphene
• Effect of electron-electron interactions on the conductivity of clean graphene
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Cited by in corpus (6)

• Measurement of the electronic compressibility of bilayer graphene
• Quantum capacitance and compressibility of graphene: The role of Coulomb interactions
• Quantum capacitance and Landau parameters of massless Dirac fermions in graphene
• Tunability of the Fractional Quantum Hall States in Buckled Dirac Materials
• Fractional Quantum Hall Effect in Hofstadter Butterflies of Dirac Fermions
• Spin Transitions in Graphene Butterflies at an Integer Filling Factor