Isic, G., Milanovic, V., Radovanovic, J. et al. (3 more authors) (2009) Nonparabolicity effects and the spin-split electron dwell time in symmetric III-V double-barrier structures. Microelectronics Journal, 40 (3). pp. 611-614. ISSN 0026-2692
Abstract
We start from the fourth order nonparabolic and anisotropic conduction band bulk dispersion relation to obtain an one-band effective Hamiltonian which we apply to an AlGaSb symmetric double-barrier structure with resonant energies significantly (more than 200meV) above the well bottom. The spin-splitting is described by the k3 Dresselhaus spin-orbit coupling term modifying only the effective mass of the spin eigenstates in the investigated structure. Apart from the bulk-like resonant energy shift due to the band nonparabolicity, we obtain a substantial shift depending on the choice of boundary conditions for the envelope functions at interfaces between different materials. The shift of resonant energy levels leads to the change of spin-splitting and the magnitude of the dwell times. We attempt to explain the influence of both the nonparabolicity and boundary conditions choice by introducing various effective masses.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | Copyright © 2008 Elsevier Ltd. This is an author produced version of a paper accepted for publication in 'Microelectronics Journal'. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | quantum wells, dwell time, nonparabolicity, spin-orbit coupling |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Depositing User: | Mr Goran Isic |
Date Deposited: | 04 Mar 2009 17:14 |
Last Modified: | 16 Sep 2016 13:45 |
Published Version: | http://dx.doi.org/10.1016/j.mejo.2008.06.032 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.mejo.2008.06.032 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:7928 |