Speaker
Zi-Yang Meng
Description
We study a lattice model of interacting Dirac fermions in
(2+1) dimension space-time with an SU(4) symmetry. While
increasing interaction strength, this model undergoes a
continuous quantum phase transition from the weakly
interacting Dirac semimetal to a fully gapped and
nondegenerate phase without condensing any Dirac fermion
bilinear mass operator. This unusual mechanism for mass
generation is consistent with recent studies of interacting
topological insulators/superconductors, and also consistent
with recent progresses in lattice QCD community.
