The electronic and optical properties of GaAsIAlAs superlattices grown in the [311] direction are investigated in the framework of an empirical tight-binding model which includes second-neighbor interactions. The [3 111 superlattices are of great interest because of their non-flat interfaces and because the periodic corrugation which appears gives rise to a lateral confinement. This results in ...

Search for high-order semiconducting quasicrystalline approximants can play an essential role in finding clues to the discovery of quasicrystals. According previous theoretical work, a model Al–Pd–Co 1/1 cubic approximant was predicted be semiconductor from calculation based on density functional theory. We noticed that F phase system is 2 × superlattice structure calculated model. To verify th...

Since the concept of doping superlattice was proposed by Esak and Tsu, the electronic properties of it were intensively investigated both theoretically and experimentally. Doping superlattices are structures which contain alternatively n-type and p-type doped regions of one semiconductor material and have a number of unique properties, such as tunable electronic structures, indirect band gap in...