Quasiparticle renormalization in ABC graphene trilayers

We investigate the effect of electron-electron interactions in ABC-stacked graphene trilayers. In the gapless regime, we show that the self-energy corrections lead to the renormalization of the dynamical exponent z = 3 + alpha sub(1)/N , with alpha sub(1) approximately 0.52 and N is the number of fermionic species. Although the quasiparticle residue is suppressed near the neutrality point, the lifetime has a sublinear scaling with the energy and the quasiparticles are well defined even at zero energy. We calculate the renormalization of a variety of physical observables, which can be directly measured in experiments.