Controlling electronic and adiabatic isolation of quantum dots from the substrate : an ionization-energy theoretic study
Arulsamy, Andrew Das & Ostrikov, Kostya (2010) Controlling electronic and adiabatic isolation of quantum dots from the substrate : an ionization-energy theoretic study. Physica B : Condensed Matter, 405(9), pp. 2263-2271.
Recent controversy on the quantum dots dephasing mechanisms (between pure and inelastic) is re-examined by isolating the quantum dots from their substrate by using the appropriate limits of the ionization energy theory and the quantum adiabatic theorem. When the phonons in the quantum dots are isolated adiabatically from the phonons in the substrate, the elastic or pure dephasing becomes the dominant mechanism. On the other hand, for the case where the phonons from the substrate are non-adiabatically coupled to the quantum dots, the inelastic dephasing process takes over. This switch-over is due to different elemental composition in quantum dots as compared to its substrate. We also provide unambiguous analysis as to understand why GaAs/AlGaAs quantum dots may only have pure dephasing while InAs/GaAs quantum dots give rise to the inelastic dephasing as the dominant mechanism. It is shown that the elemental composition plays an important role (of both quantum dots and substrate) in evaluating the dephasing mechanisms of quantum dots.
Impact and interest:
Citation counts are sourced monthly from and citation databases.
These databases contain citations from different subsets of available publications and different time periods and thus the citation count from each is usually different. Some works are not in either database and no count is displayed. Scopus includes citations from articles published in 1996 onwards, and Web of Science® generally from 1980 onwards.
Citations counts from theindexing service can be viewed at the linked Google Scholar™ search.
|Item Type:||Journal Article|
|Keywords:||Quantum dots, Ionization energy, Electron–phonon interaction, Dephasing mechanism|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Crown Copyright 2010 Published by Elsevier B.V.|
|Copyright Statement:||This is the author’s version of a work that was accepted for publication in Physica B : Condensed Matter. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Physica B : Condensed Matter, [VOL 405, ISSUE 9, (2010)] DOI: 10.1016/j.physb.2010.02.023|
|Deposited On:||05 Aug 2014 01:47|
|Last Modified:||05 Aug 2014 22:42|
Repository Staff Only: item control page