MoSe2 as a typical transition metal dichalcogenide holds great potential for energy storage
and catalysis but its performance is largely limited by its poor conductivity. Bi2Se3 …

The ability to assemble layers of two-dimensional (2D) materials to form permutations of van
der Waals heterostructures provides significant opportunities in materials design and …

The density of states at the Fermi surface controls many material properties by influencing
the low-energy interactions of conductive electrons. Typically, external tuning knobs …

Two-dimensional topological insulators/semimetals have recently attracted much attention.
However, quantum-sized topological insulators/semimetals with intrinsic characteristics …

Recently, we employed electronic polarization-resolved Raman spectroscopy to reveal the
strongly correlated excitonic insulator (EI) nature of Ta 2 Ni Se 5 [Volkov, npj Quant. Mater. 6 …

The protected electron states at the boundaries or on the surfaces of topological insulators
(TIs) have been the subject of intense theoretical and experimental investigations. Such …

Using polarization-resolved resonant Raman spectroscopy, we explore collective spin
excitations of the chiral surface states in a three dimensional topological insulator, Bi 2 Se 3 …

We report an observation of coherent phonons of E g 1, E u 1, A 1 g 1, and E g 2 symmetry
generated in a single-crystal film of Bi 2 Se 3 by an intense single-cycle THz pulse. The …

We investigate coupled electron-lattice dynamics in the topological insulator Bi 2 Te 3 with
time-resolved photoemission and time-resolved x-ray diffraction. It is well established that …

Bi2Se3 was synthesized by a room-temperature deposition technique and successive ionic
layer adsorption and reaction (SILAR) method with the aim to understand the formation …