Quantum Confinement in Heterostructured Semiconductor Nanowires with Graded Interface

Abstract

Where m and m ⊥ are the in-plane and longitudinal effective masses, respectively, andis the cyclotron frequency. In core-shell wires, we consider a potential V which includes not only the heterostructure, but also the electron-hole Coulomb potential. For the zinc-blend materials we studied, the valence band presents heavy and light hole states and, since in block-by-block wires the charge carriers are confined in three dimensions, the valence band states cannot be discussed in terms of a single hole state and a multi-band k.p study is necessary in this case. Hence, in this work we study excitonic effects only for core-

Electron Transport in AlGaAs Cylindrical Quantum Wire Sandwiched between Two GaAs Cylindrical Quantum Well Wires

“…Farias et al have carried out a theoretical study of the electronic properties of quantum wires with a longitudinal heterostructure. The results show the existence of graded interfaces between the materials which can be responsible for significant fluctuations in the confinement energies, and for a change in the structure of the wire [18]. Oka Kurniawan et al propose an efficient model to calculate the current-voltage characteristic of a cylindrical nanowire in the framework of the unbalanced Green function.…”