Quantum capacitance of the monolayer graphene

•The quantum capacitance of the monolayer graphene for arbitrary magnetic field, temperature, LL broadening and realistic splitting of LL spectrum is calculated. Magnetic field measurements of the quantum capacitance at high- and low- temperature modes are consistent with our approach.

The quantum capacitance of the monolayer graphene for arbitrary carrier density, magnetic field, temperature and LL broadening is found. The density dependence of the quantum capacitance is analyzed when magnetic field (temperature) is fixed (varied) and vice versa. High-field induced splitting of the LL energy spectrum is examined. The theory is compared with the experimental data.