The last few years have seen an explosion of interest in hydrodynamic effects in interacting
electron systems in ultra-pure materials. One such material, graphene, is not only an …

The basic aspects of electrons in graphene (two-dimensional graphite) exposed to a strong
perpendicular magnetic field are reviewed. One of its most salient features is the relativistic …

External control of the conductivity of correlated oxides is one of the most promising
schemes for realizing energy-efficient electronic devices. Vanadium dioxide (VO2), an …

Inspired by the great development of graphene, more and more research has been
conducted to seek new two-dimensional (2D) materials with Dirac cones. Although 2D Dirac …

While the basic principles of conventional solar cells are well understood, little attention has
gone towards maximizing the efficiency of photovoltaic devices based on shift currents. By …

We study under which general conditions a pair of Dirac points in the electronic spectrum of
a two-dimensional crystal may merge into a single one. The merging signals a topological …

With first principles calculations, we predict a novel stable 2D layered structure for group VI
elements Se and Te that we call square selenene and square tellurene, respectively. They …

We propose a simple Hamiltonian to describe the motion and the merging of Dirac points in
the electronic spectrum of two-dimensional electrons. This merging is a topological transition …

We consider the dimensional crossover in the topological matter, which involves the
transformation of different types of topologically protected zeroes in the fermionic spectrum …

The Dirac materials, such as graphene and three-dimensional topological insulators, have
attracted much attention because they exhibit novel quantum phenomena with their low …