The two-dimensional electron systems in graphene and in topological insulators are
described by massless Dirac equations. Although the two systems have similar …

Surface‐enhanced infrared absorption (SEIRA) has attracted increasing attention due to the
potential of infrared spectroscopy in applications such as molecular trace sensing of solids …

Topological insulators have been proposed to be best characterized as bulk
magnetoelectric materials that show response functions quantized in terms of fundamental …

Abstract A three-dimensional (3D) topological insulator features a 2D surface state
consisting of a single linearly dispersive Dirac cone,–. Under broken time-reversal …

We perform time-and angle-resolved photoemission spectroscopy of a prototypical
topological insulator (TI) Bi 2 Se 3 to study the ultrafast dynamics of surface and bulk …

The electrodynamics of topological insulators (TIs) is described by modified Maxwell's
equations, which contain additional terms that couple an electric field to a magnetization and …

Broadband photodetection is central to various technological applications including
imaging, sensing and optical communications. On account of their Dirac-like surface state …

Graphene, a monolayer sheet of carbon atoms, exhibits intriguing electronic properties that
arise from its massless Dirac dispersion of electrons. A striking example is the half-integer …

Electrons with a linear energy/momentum dispersion are called massless Dirac electrons
and represent the low-energy excitations in exotic materials such as graphene and …

Electrodynamic responses from three-dimensional topological insulators are characterized
by the universal magnetoelectric term constituent of the Lagrangian formalism. The …