  We present a functional renormalization group investigation of an Euclidean
three-dimensional matrix Yukawa model with U(N) symmetry, which describes N = 2
Weyl fermions that effectively interact via a short-range repulsive
interaction. This system relates to an effective low-energy theory of spinless
electrons on the honeycomb lattice and can be seen as a simple model for
suspended graphene. We find a continuous phase transition characterized by
large anomalous dimensions for the fermions and composite degrees of freedom.
The critical exponents define a new universality class distinct from
Gross-Neveu type models, typically considered in this context.
