12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Electron wave-function spillover in self-assemb...
View graph of relations

« Back

Electron wave-function spillover in self-assembled InAs/InP quantum wires

Research output: Contribution to journalJournal article

Published

  • J Maes
  • M Hayne
  • Y Sidor
  • B Partoens
  • F M Peeters
  • Y Gonzalez
  • L Gonzalez
  • D Fuster
  • Jorge M. Garcia
  • V V Moshchalkov
Article number155311
Journal publication date15/10/2004
JournalPhysical Review B
Journal number15
Volume70
Number of pages7
Original languageEnglish

Abstract

Charge confinement in InAs/InP self-assembled quantum wires is studied experimentally using photoluminescence in pulsed magnetic fields and theoretically using adiabatic theory within the effective-mass approximation, taking into account the strain in the samples. We show both experimentally and theoretically that, in spite of the large conduction band offset, the electron wave function is significantly spilled out of the wire in the wire height direction for thin wires. Furthermore, for a wire thickness of up to 8 monolayers, the electron spillover is inversely related to the wire height. These effects are due to the large zero point energy of the electron. As the wire becomes thicker, the decrease in confinement energy is reflected in a reduction of the electron wave-function extent.