Miniband formulation of bilayer type II Ge/Si quantum dot superlattices

Yi Chia Tsai, Ming Yi Lee, Yiming Li, Seiji Samukawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

This article presents a computational study on the impact of layer distance on the miniband formulation and density of state under different quantum dot structural parameters-height, interdot space-in a bilayer and well-aligned Ge/Si quantum-dot array. The miniband bandwidth, energy and effective bandgap is tunable by introducing an additional quantum dot layer. When the vertical distance between layers is smaller than 2.0 nm, the individual band structure of each layer will separate and couple into a broader bandwidth. The effective bandgap decreases since the highest excited states, with broader bandwidth, mix with and become continuous energy levels.

Original languageEnglish
Title of host publication16th International Conference on Nanotechnology - IEEE NANO 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages891-894
Number of pages4
ISBN (Electronic)9781509039142
DOIs
Publication statusPublished - 2016 Nov 21
Event16th IEEE International Conference on Nanotechnology - IEEE NANO 2016 - Sendai, Japan
Duration: 2016 Aug 222016 Aug 25

Publication series

Name16th International Conference on Nanotechnology - IEEE NANO 2016

Other

Other16th IEEE International Conference on Nanotechnology - IEEE NANO 2016
CountryJapan
CitySendai
Period16/8/2216/8/25

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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