The discovery of the quantum spin Hall effect and topological insulators more than a decade
ago has revolutionized modern condensed matter physics. Today, the field of topological …

The analysis of the electronic properties of strained or lattice deformed graphene combines
ideas from classical condensed matter physics, soft matter, and geometrical aspects of …

When electrons populate a flat band their kinetic energy becomes negligible, forcing them to
organize in exotic many-body states to minimize their Coulomb energy,,,–. The zeroth …

We consider a model of Dirac fermions in 2+ 1 dimensions with dynamically generated,
anticommuting SO (3) Néel and Z 2 Kekulé mass terms that permits sign-free quantum …

We construct and discuss the field theory for tensorial nematic order parameter coupled to
gapless four-component fermions at the quadratic band touching point in three (spatial) …

We investigate the phase diagram of spinless fermions with nearest-and next-nearest-
neighbor density-density interactions on the honeycomb lattice at half-filling. Using exact …

We study a one-dimensional model of interacting bosons coupled to a dynamical Z 2 field,
the Z 2 Bose-Hubbard model, and analyze the interplay between spontaneous symmetry …

We study scalar and chiral fermionic models in next-to-leading order with the help of the
functional renormalization group. Their critical behavior is of special interest in condensed …

We use exact diagonalization and cluster perturbation theory to address the role of strong
interactions and quantum fluctuations for spinless fermions on the honeycomb lattice. We …

We investigate a class of relativistic fermion theories in 2< d< 4 space-time dimensions with
continuous chiral U (N f)× U (N f) symmetry. This includes a number of well-studied models …