Graphene is very popular because of its many fascinating properties, but its lack of an
electronic bandgap has stimulated the search for 2D materials with semiconducting …

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 …

We investigate topological properties in the Fe (Te, Se) thin films. We find that the single
layer FeTe 1− x Se x has nontrivial Z 2 topological invariance which originates from the …

The mathematical field of topology has become a framework in which to describe the low-
energy electronic structure of crystalline solids. Typical of a bulk insulating three …

A variety of monolayer crystals have been proposed to be two-dimensional topological
insulators exhibiting the quantum spin Hall effect (QSHE), possibly even at high …

Abstract Two-dimensional (2D) materials have emerged as promising candidates for next-
generation electronic and optoelectronic applications. Yet, only a few dozen 2D materials …

A quantum spin Hall (QSH) insulator is a novel two-dimensional quantum state of matter that
features quantized Hall conductance in the absence of a magnetic field, resulting from …

In recent years, transition metal dichalcogenides (TMDs) have garnered great interest as
topological materials. In particular, monolayers of centrosymmetric β-phase TMDs have …

Quantum spin Hall materials hold the promise of revolutionary devices with dissipationless
spin currents but have required cryogenic temperatures owing to small energy gaps. Here …

Topological materials discovery has evolved at a rapid pace over the past 15 years following
the identification of the first nonmagnetic topological insulators (TIs), topological crystalline …