Two-dimensional topological insulators (2D TIs) are a remarkable class of atomically thin
layered materials that exhibit unique symmetry-protected helical metallic edge states with an …

Ever since discovery of graphene, two‐dimensional (2D) materials become a new tool box
for information technology. Among the 2D family, ultrathin bismuth (Bi) has attracted a great …

The progress in science and technology is largely boosted by the continuous discovery of
new materials. In recent years, the state‐of‐art first‐principles computational approach has …

Bismuth has been the key element in the discovery and development of topological insulator
materials. Previous theoretical studies indicated that Bi is topologically trivial and it can …

Ultrathin bismuth exhibits rich physics including strong spin-orbit coupling, ferroelectricity,
nontrivial topology, and light-induced structural dynamics. We use ab initio calculations to …

One distinguished property of the topological insulator (TI) is its robust quantized edge
conductance against edge defect. However, this robustness, underlined by the topological …

Meeting of non-trivial topology with magnetism results in novel phases of matter, such as
quantum anomalous Hall (QAH) or axion insulator phases. Even more exotic states with …

Searching for novel two-dimensional (2D) materials with desirable properties is of great
significance for the design of next generation nano-devices. In this work, we address the …

Single layers of transition metal dichalcogenides are of interest for emergent properties; an
often-neglected issue is substrate effects. Our experiments show that the charge density …

Topological insulators (TI's) are a new class of quantum matter with extraordinary surface
electronic states, which bear great potential for spintronics and error-tolerant quantum …