The electronic structure of a Bi/Sb superlattice nanowire

Abstract

The electronic structure of a Bi/Sb superlattice nanowire have been investigated using a theoretical model, in which the nanowire is assumed to possess a circular cross section with a uniform diameter. The variation of the electronic structure as a function of segment length and the total density of states for a Bi/Sb superlattice nanowire with a certain diameter of 5 nm are presented. The minigaps in the total density of states may lead to change in sign of the thermopower for certain energy ranges as the Fermi energy varies, which indicates that the superlattice nanowire can demonstrate n-or p-type behavior by using the same dopants.