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 …

Topological insulators and their intriguing edge states can be understood in a single-particle
picture and can as such be exhaustively classified. Interactions significantly complicate this …

Studies of two-dimensional electron systems in a strong magnetic field revealed the
quantum Hall effect, a topological state of matter featuring a finite Chern number C and …

Topology and electron interactions are two central themes in modern condensed matter
physics. Here, we propose graphene-based systems where both the band topology and …

We propose magic-angle helical trilayer graphene (HTG), a helical structure featuring
identical rotation angles between three consecutive layers of graphene, as a unique and …

Using exact diagonalization, we study the projected Hamiltonian with the Coulomb
interaction in the eight flat bands of first magic angle twisted bilayer graphene. Employing …

Fractionally filled Chern bands with strong interactions may give rise to fractional Chern
insulator (FCI) states, the zero-field analog of the fractional quantum Hall effect. Recent …

We demonstrate, using first-principles calculations, that the electronic structure of FeSe 1− x
Te x (x= 0.5) is topologically nontrivial and characterized by an odd Z 2 invariant and Dirac …

We show that bilayer graphene in the presence of a 2D superlattice potential provides a
highly tunable setup that can realize a variety of flat band phenomena. We focus on two …

We report on the engineering of a nondispersive (flat) energy band in a geometrically
frustrated lattice of micropillar optical cavities. By taking advantage of the non-Hermitian …