A topological insulator protected by time-reversal symmetry is realized via spin–orbit
interaction-driven band inversion. The topological phase in the Bi1− x Sb x system is due to …

We consider the pairing of massless Dirac electrons and holes located on opposite surfaces
of thin films of “strong” three-dimensional topological insulators. Such pairing is predicted to …

We investigate a bilayer system of critical HgTe quantum wells, each featuring a spin-
degenerate pair of massless Dirac fermions. In the presence of an electrostatic interlayer …

Interaction induced topological states remain one of the most fascinating phenomena in
condensed matter physics. The exciton condensate has recently sparked renewed interest …

We report a theoretical study of the many-body effects of electron–electron interaction on the
ground-state and spectral properties of double-layer graphene. Using a projector-based …

Based on first-principles calculations, we predict a new family of chromium-based
compounds, ACrTe (A= Na, K, Rb, Cs), which share the same structure as the iron-based …

We introduce the topological mirror excitonic insulator as a new type of interacting
topological crystalline phase in one dimension. Its mirror-symmetry-protected topological …

The formation of the roton-maxon excitation spectrum and the roton instability effect for a
weakly correlated Bose gas of dipolar excitons in a semiconductor layer are predicted. The …

We consider a bilayer system of two-dimensional Bose-Einstein-condensed dipolar dark
excitons (upper layer) and bright ones (bottom layer). We demonstrate that the interlayer …

This paper investigates theoretically the excitonic condensation state at zero temperature in
a double-layer graphene structure. In the framework of the unrestricted Hartree–Fock …