Coupling Behaviors and Decoupling Transitions of CdTe-ZnTe Symmetric versus Asymmetric Double-Quantum Wells

$113.00 plus tax (Refund Policy)

Buy Article:

Abstract:

The electronic structures of the (CdTe)Nw1 (ZnTe)Nb (CdTe)Nw2-ZnTe(001) symmetric and asymmetric double-quantum wells (s-DQW and a-DQW) are presented. The tight-binding sp3s* method, with inclusion of spin-orbit coupling, is used to calculate the band-gap energy, quantum-confinement energy, carrier planar-spin-averaged wavefunction-squared amplitudes and band structures versus the barrier thickness (Nb), well widths (Nw1 and Nw2) and valence-band offset (VBO). Special attention was given to the well-to-well coupling behaviors in both a-DQW and s-DQW and the estimation of the critical barrier thickness Lcritb corresponding to their decoupling. In the case of a-DQW, the wavefunctions of bound states are found to have strong tendency to localize in one of the two wells and, as a consequence, the decoupling occurs at Lcritb ≃ 18 Å, much shorter than the case of s-DQW (where Lcritb ≃ 38 Å). Our results of Eg are in excellent agreement with the available photoluminescence data and the structural and optical qualities of the experimental samples are discussed.

Keywords: II-VI SEMICONDUCTORS; QUANTUM WELLS; SEMICONDUCTOR COMPUNDS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jctn.2009.1027

Publication date: January 1, 2009

More about this publication?
  • Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
  • Editorial Board
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Terms & Conditions
  • ingentaconnect is not responsible for the content or availability of external websites
Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more