Emerging Electronic Properties of Polymorphic2D‐TMDs

Two-dimensional (2D) transition metal dichalcogenides (TMDs) exhibit a broad spectrum of remarkable physical properties, making them appealing for many applications such as nanoelectronics, optoelectronics, and wearable devices. Due to the atomically thin thickness of 2D TMDs, electron-lattice interaction, spin-orbit coupling, Coulomb interaction, and light-matter interaction manifest themselves in 2D TMDs. These endow various emerging properties, including strong excitonic effect, polaron states, charge density wave, valley polarization, and superconductivity. In this chapter, we start with a brief introduction to the electronic band structures and optical properties of 2D TMDs, and then focus on the emerging properties of 2D TMDs.