Introduction of semiconductor superlattice
A semiconductor superlattice refers to a single crystal in which a plurality of layers of thin film are repeatedly arranged. The thickness of each layer in the multilayer film ranges from several to several tens of atomic layers. The major semiconductor properties of each layer, such as band gap and doping level, can be independently controlled. The period of the multilayer film can be artificially controlled during growth, and thus an artificial crystal structure, that is, a superlattice, is obtained. The superlattice in which the components of each layer in the multilayer film are mutated is called a component-modulated superlattice; the superlattice of each layer having a doped atomic type is called a doped modulation superlattice.