Angle-resolved photoemission spectroscopy (ARPES)—an experimental technique based
on the photoelectric effect—is arguably the most powerful method for probing the electronic …

Angle-resolved photoemission spectroscopy (ARPES), with its exceptional sensitivity to both
the binding energy and the momentum of valence electrons in solids, provides unparalleled …

Apart from conventional materials, the study of two-dimensional (2D) materials has emerged
as a significant field of study for a variety of applications. Graphene-like 2D materials are …

Three-dimensional topological insulators are fascinating materials with insulating bulk yet
metallic surfaces that host highly mobile charge carriers with locked spin and momentum …

In the last decade, there has been a proliferation of laser sources for time-and angle-
resolved photoemission spectroscopy (TR-ARPES), building on the proven capability of this …

We report time-and angle-resolved photoemission spectroscopy measurements on the
topological insulator Bi 2 Se 3. We observe oscillatory modulations of the electronic structure …

Surfaces and interfaces are of particular importance for optoelectronic and photonic
materials as they are involved in many physical and chemical processes such as carrier …

A unified expression for topological invariants was proposed recently to describe the
topological order in Dirac models belonging to any dimension and symmetry class. We …

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 …

The bulk carrier excitation influences the phonon dynamics, which can alter and modulate
the surface charge density of topological insulators such as bismuth selenide (Bi2Se3). This …