Specific heat, the heat capacity per unit mass, describes the energy required to change the temperature of a sample. The low-temperature electronic specific heat of Dirac matter is C ( T → → 0 ) ∼ ∼ T d which is different from C ( T → → 0 ) ∼ ∼ T encountered for normal metals. Therefore, for systems whose physical dimension is greater than 1, the specific heat can provide a clear signature of the underlying Dirac nature of the quasiparticles.