Effect of size on electronic states in a strained pyramidal InAs-GaAs quantum dot system

G. H. Ripan, C. Y. Woon, Geri Kibe Gopir

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

Abstract

The effect of size on electronic states in a strained pyramidal InAs-GaAs quantum dot system was studied. A comparison was made between two InAs quantum pyramids of different sizes embedded inside a cubic GaAs susbtrate material. Strain relaxation was carried out via the Metropolis Monte Carlo method and the calculated local strain tensors were then included to solve the energy values and the wave functions of the electronic states inside the two simulation cube. The 3D finite difference scheme was employed to solve the time independent Schrödinger equation based on the decoupled electron-hole model. Calculated energy values of the four lowest electronic states showed that the transitions between the electron and hole states widen as the size of the dot becomes smaller especially between the ground states. The confinement of electrons and holes become weaker as the size of the dot reduces.

Original languageEnglish
Title of host publication2015 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2015 Postgraduate Colloquium
PublisherAmerican Institute of Physics Inc.
Volume1678
ISBN (Electronic)9780735413252
DOIs
Publication statusPublished - 25 Sep 2015
Event2015 Postgraduate Colloquium of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology, UKM FST 2015 - Selangor, Malaysia
Duration: 15 Apr 201516 Apr 2015

Other

Other2015 Postgraduate Colloquium of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology, UKM FST 2015
CountryMalaysia
CitySelangor
Period15/4/1516/4/15

Fingerprint

quantum dots
electronics
electron states
pyramids
Monte Carlo method
wave functions
tensors
ground state
energy
electrons
simulation

Keywords

  • electronic states
  • InAs-GaAs quantum dots
  • Metropolis Monte Carlo
  • strain

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Ripan, G. H., Woon, C. Y., & Gopir, G. K. (2015). Effect of size on electronic states in a strained pyramidal InAs-GaAs quantum dot system. In 2015 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2015 Postgraduate Colloquium (Vol. 1678). [040015] American Institute of Physics Inc.. https://doi.org/10.1063/1.4931272

Effect of size on electronic states in a strained pyramidal InAs-GaAs quantum dot system. / Ripan, G. H.; Woon, C. Y.; Gopir, Geri Kibe.

2015 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2015 Postgraduate Colloquium. Vol. 1678 American Institute of Physics Inc., 2015. 040015.

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

Ripan, GH, Woon, CY & Gopir, GK 2015, Effect of size on electronic states in a strained pyramidal InAs-GaAs quantum dot system. in 2015 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2015 Postgraduate Colloquium. vol. 1678, 040015, American Institute of Physics Inc., 2015 Postgraduate Colloquium of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology, UKM FST 2015, Selangor, Malaysia, 15/4/15. https://doi.org/10.1063/1.4931272
Ripan GH, Woon CY, Gopir GK. Effect of size on electronic states in a strained pyramidal InAs-GaAs quantum dot system. In 2015 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2015 Postgraduate Colloquium. Vol. 1678. American Institute of Physics Inc. 2015. 040015 https://doi.org/10.1063/1.4931272
Ripan, G. H. ; Woon, C. Y. ; Gopir, Geri Kibe. / Effect of size on electronic states in a strained pyramidal InAs-GaAs quantum dot system. 2015 UKM FST Postgraduate Colloquium: Proceedings of the Universiti Kebangsaan Malaysia, Faculty of Science and Technology 2015 Postgraduate Colloquium. Vol. 1678 American Institute of Physics Inc., 2015.
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