Seeking Novel Low-Symmetry 2D Materials with Strong In-plane Anisotropy

Low-symmetry 2D materials, such as black phosphorus (BP), ReS2, etc., usually exhibit unique characteristic of its in-plane anisotropy. Inspired by this, the searching for novel low-symmetry 2D materials beyond BP and ReS2 is essential for creating polarization dependent devices and will benefit the future explorations of heterojunction on low-symmetry 2D materials. This perspective reviews the research on structure, characterization and applications of low-symmetry 2D materials.