We review theoretical and experimental highlights in transport in two-dimensional
topological materials over the last five years. Topological materials comprise topological …

In solid state conductors, linear response to a steady electric field is normally dominated by
Bloch state occupation number changes that are correlated with group velocity and lead to a …

The rectified nonlinear response of a clean, time-reversal symmetric, undoped
semiconductor to an ac electric field includes a well known intrinsic shift current. We show …

The influence of phonons on the formation of the excitonic insulator has hardly been
analyzed so far. Recent experiments on Ta 2 NiSe 5, 1 T-TiSe 2, and TmSe 0.45 Te 0.55 …

Angle-resolved second harmonic generation (SHG) spectra of ZnO microwires show
characteristic Fano resonances in the spectral vicinity of exciton-polariton modes. We …

Topological materials have attracted considerable experimental and theoretical attention.
They exhibit strong spin-orbit coupling both in the band structure (intrinsic) and in the …

We investigate the optical properties of ultrathin film of a topological insulator in the
presence of an in-plane magnetic field. We show that due to the combination of the overlap …

Three-dimensional strong topological insulators (TIs) guarantee the existence of a two-
dimensional (2-D) conducting surface state which completely covers the surface of the TI …

We study theoretically the dynamic Friedel oscillations of electrons at the surface of a
topological insulator (TI) that are generated by the rotation of a localized impurity spin. We …

We propose and theoretically substantiate a method to study the nonlocal conductivity of two-
dimensional electron systems (2DESs) using the tools of near-field microscopy. We show …