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Dispersion and the electron-phonon interaction in a single heterostructure

Naylor, Daniel R.; Dyson, Angela; Ridley, B. K.

Authors

Daniel R. Naylor

Angela Dyson

B. K. Ridley



Abstract

We investigate the electron-phonon interaction in a polar-polar single heterostructure through the use of the linear combination of hybrid phonon modes, considering the role of longitudinal optical, transverse optical and interface modes, using a continuum model that accounts for both mechanical and electrical continuity over a heterostructure interface. We discuss the use of other models for such systems, such as the bulk phonon (3DP) and dielectric continuum (DC) models, using previously developed sum-rules to explain the limitations on their validity. We find that our linear combination (LC) model gives an excellent agreement with scattering rates previously derived using the 3DP and DC models when the lattice dispersion is weak enough to be ignored, however, when there is a noticeable lattice dispersion, the LC model returns a different answer, suggesting that interface modes play a much greater part in the scattering characteristics of the system under certain conditions. We also discuss the remote phonon effect in polar/polar heterostructures.

Citation

Naylor, D. R., Dyson, A., & Ridley, B. K. (2017). Dispersion and the electron-phonon interaction in a single heterostructure. Physica E: Low-dimensional Systems and Nanostructures, 86, (218-224). doi:10.1016/j.physe.2016.06.027. ISSN 1386-9477

Journal Article Type Article
Acceptance Date Jun 30, 2016
Online Publication Date Jul 1, 2016
Publication Date 2017-02
Deposit Date Jul 12, 2016
Publicly Available Date Jul 12, 2016
Journal Physica. E, Low-dimensional systems and nanostructures
Print ISSN 1386-9477
Electronic ISSN 1873-1759
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 86
Pages 218-224
DOI https://doi.org/10.1016/j.physe.2016.06.027
Keywords Semiconductor heterostructures; Phonon modes; Hybrid model; Scattering
Public URL https://hull-repository.worktribe.com/output/440815
Publisher URL http://www.sciencedirect.com/science/article/pii/S1386947716306920
Copyright Statement © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Additional Information Authors' accepted manuscript of article published in: Physica. E, Low-dimensional systems and nanostructures, 2016, v.86

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