Abstract Since penta-graphene (PG), a two-dimensional (2D) carbon allotrope exclusively
composed of five-membered rings, was proposed in 2015, a great deal of effort has been …

Abstract 2D materials are emerging as ideal candidates for fundamental investigations and
new technologies due to their unique optoelectronic properties. Giant nonlinear …

Controlling the crystal structure is a powerful approach for manipulating the fundamental
properties of solids. In van der Waals materials, this control can be achieved by modifying …

Phase transitions governed by spontaneous time reversal symmetry breaking (TRSB) have
long been sought in many quantum systems, including materials with anomalous Hall effect …

With its linear energy dispersion and large transition dipole matrix element, graphene is an
attractive material for nonlinear optoelectronic applications. However, the mechanistic origin …

Twisted van der Waals (vdW) quantum materials have emerged as a rapidly developing field
of two-dimensional (2D) semiconductors. These materials establish a new central research …

As for nonlayered 2D polymorphic materials, especially for Cr‐based chalcogenides, large‐
area thin film growth with phase control is considered the most important synthesis …

Stacking orders in 2D van der Waals (vdW) materials dictate the relative sliding (lateral
displacement) and twisting (rotation) between atomically thin layers. By altering the stacking …

Rectification is a process that converts electromagnetic fields into a direct current. Such a
process underlies a wide range of technologies such as wireless communication, wireless …

Despite the potential of graphene for building a variety of quantum photonic devices, its
centrosymmetric nature forbids the observation of second harmonic generation (SHG) for …