The first-principles band theory paradigm has been a key player not only in the process of
discovering new classes of topologically interesting materials, but also for identifying salient …

Two-dimensional surface-scattering dynamics are central in the physics of topological
insulators. Numerous electrical and optical measurements have evidenced that the origins …

Three-dimensional topological insulators (TIs) have attracted tremendous interest for their
possibility to host massless Dirac Fermions in topologically protected surface states (TSSs) …

Topological insulators (TIs) are a new quantum state of matter. Their surfaces and interfaces
act as a topological boundary to generate massless Dirac fermions with spin-helical …

In condensed matter physics, quasi-particle correlations are crucial to understanding a
material's properties. For example, strong interaction between electrons with metal-like …

Modulating light via coherent charge oscillations in solids is the subject of intense research
topics in opto-plasmonics. Although a variety of methods are proposed to increase such …

Three-dimensional topological insulators (TIs) are characterized by spin-polarized Dirac-
cone surface states that are protected from backscattering by time-reversal symmetry …

Ultrafast charge and spin dynamics have immense effects on the applications of topological
insulators (TIs). By performing spin-adiabatic nonadiabatic molecular dynamics simulations …

Vanadium diselenide (VSe2) has recently been highlighted as an efficient 2D electrode
owing to its extra-high conductivity, thickness controllability, and van der Waals contact …

We report on a time-resolved ultrafast optical spectroscopy study of the topological insulator
Bi 2 Se 3. We unravel that a net spin polarization cannot only be generated using circularly …