A self-consistent analysis of subband alignment in a superlattice with one larger well

Abstract

Self-consistent calculations of multi-quantum well semiconductor structures based on a Finite-Element Method are presented. The self-consistent calculation is specially needed when wells of different width are present in the structure, generating a larger charge separation and affecting significantly the tunneling conditions. The object-oriented computer code used was implemented using a finite-element class library developed and used in previous works. Results for an asymmetric heterostructure with a larger well and contact layers are also presented.

Optimization of Nanostructured Devices Using Self-consistent Calculations

“…Otherwise, if the periodicity is broken with a well of different width, charge separation increases and a self-consistent calculation becomes essential. A self-consistent analysis of the effect of a larger well introduced in the middle of a superlattice was presented in (7). In this case, even for a qualitative understanding of electrical dynamics in such a structure, the self-consistent computations were needed (8).…”