Polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: transfer-matrix method

Based on the dielectric continuum model and transfer-matrix method, the completing polar optical phonon states in a wurtzite GaN-based superlattice (SLs) with arbitrary-layer complex bases are investigated. It is proved that 2<sup>n</sup> types of phonon modes probably exist in a wurtzit...

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Main Author:	L. Zhang
Format:	Article
Language:	English
Published:	Institute for Condensed Matter Physics 2011-03-01
Series:	Condensed Matter Physics
Subjects:	optical phonon modes dispersive spectra wurtzite superlattice transfer-matrix method
Online Access:	http://dx.doi.org/10.5488/CMP.14.13602

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record_format	Article
spelling	doaj-ae20ca924f3e4b35bddd84f79e6155482020-11-24T21:19:52ZengInstitute for Condensed Matter PhysicsCondensed Matter Physics1607-324X2011-03-0114113602Polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: transfer-matrix methodL. ZhangBased on the dielectric continuum model and transfer-matrix method, the completing polar optical phonon states in a wurtzite GaN-based superlattice (SLs) with arbitrary-layer complex bases are investigated. It is proved that 2<sup>n</sup> types of phonon modes probably exist in a wurtzite nitride SL with n-layer complex bases. The analytical phonon states of these modes and their dispersive equations in the wurtzite GaN/Al<sub>x</sub>Ga<sub>1-x</sub>N SL structures are obtained. Numerical calculations on a three-layer GaN/Al<sub>0.15</sub>Ga<sub>0.85</sub>N/AlN complex bases SL are performed. Results reveal that there are interface optical (IO) phonon modes of one type only and four types of quasi-confined (QC) phonon modes in three-layer GaN/Al<sub>0.15</sub>Ga<sub>0.85</sub>N/AlN complex bases SLs. The dispersive spectra of phonon modes in complex bases SLs extend to be a series of frequency bands. The behaviors of QC modes reducing to IO modes are observed. The present theoretical scheme and numerical results are quite useful for analyzing the dispersive spectra of completing phonon modes and their polaronic effect in wurtzite GaN-based SLs with complex bases.http://dx.doi.org/10.5488/CMP.14.13602 optical phonon modesdispersive spectrawurtzite superlatticetransfer-matrix method
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	L. Zhang
spellingShingle	L. Zhang Polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: transfer-matrix method Condensed Matter Physics optical phonon modes dispersive spectra wurtzite superlattice transfer-matrix method
author_facet	L. Zhang
author_sort	L. Zhang
title	Polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: transfer-matrix method
title_short	Polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: transfer-matrix method
title_full	Polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: transfer-matrix method
title_fullStr	Polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: transfer-matrix method
title_full_unstemmed	Polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: transfer-matrix method
title_sort	polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: transfer-matrix method
publisher	Institute for Condensed Matter Physics
series	Condensed Matter Physics
issn	1607-324X
publishDate	2011-03-01
description	Based on the dielectric continuum model and transfer-matrix method, the completing polar optical phonon states in a wurtzite GaN-based superlattice (SLs) with arbitrary-layer complex bases are investigated. It is proved that 2<sup>n</sup> types of phonon modes probably exist in a wurtzite nitride SL with n-layer complex bases. The analytical phonon states of these modes and their dispersive equations in the wurtzite GaN/Al<sub>x</sub>Ga<sub>1-x</sub>N SL structures are obtained. Numerical calculations on a three-layer GaN/Al<sub>0.15</sub>Ga<sub>0.85</sub>N/AlN complex bases SL are performed. Results reveal that there are interface optical (IO) phonon modes of one type only and four types of quasi-confined (QC) phonon modes in three-layer GaN/Al<sub>0.15</sub>Ga<sub>0.85</sub>N/AlN complex bases SLs. The dispersive spectra of phonon modes in complex bases SLs extend to be a series of frequency bands. The behaviors of QC modes reducing to IO modes are observed. The present theoretical scheme and numerical results are quite useful for analyzing the dispersive spectra of completing phonon modes and their polaronic effect in wurtzite GaN-based SLs with complex bases.
topic	optical phonon modes dispersive spectra wurtzite superlattice transfer-matrix method
url	http://dx.doi.org/10.5488/CMP.14.13602
work_keys_str_mv	AT lzhang polaropticalphononstatesandtheirdispersivespectraofawurtzitenitridesuperlatticewithcomplexbasestransfermatrixmethod
_version_	1726004830659411968

Polar optical phonon states and their dispersive spectra of a wurtzite nitride superlattice with complex bases: transfer-matrix method

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