Investigation of electron wave function hybridization in Ga0.25In0.75As/InP arrays

Research output: Contribution to journalArticle

Abstract

We present a measurement technique for quantifying coupling between semiconductor quantum dots in an array. This technique employs magnetoconductance fluctuations to probe the decrease in the average spacing of the quantum energy levels as the electron wave functions in the dots undergo hybridization. Focusing on Ga0.25In0.75As dots, we investigate hybridization as the coupling strength is varied and the number of dots in the array is increased. Our technique reveals a significant drop in the average energy level spacing for multiple dot arrays, which is strong evidence for wave function hybridization.

Details

Authors
  • T. P. Martin
  • M. S. Fairbanks
  • B. C. Scannell
  • C. A. Marlow
  • Heiner Linke
  • R. P. Taylor
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Condensed Matter Physics

Keywords

  • magnetoresistance, indium compounds, III-V semiconductors, gallium arsenide, energy states, fluctuations, semiconductor quantum dots, wave, functions
Original languageEnglish
Article number182105
JournalApplied Physics Letters
Volume95
Issue number18
Publication statusPublished - 2009
Publication categoryResearch
Peer-reviewedYes