Optical phonon modes in a free-standing quantum wire with ring geometry

The confined longitudinal-optical (LO) phonon and surface-optical (SO) phonon modes of a free-standing quantum wire with ring geometry are discussed within the dielectric continuum (DC) approximation. Two branches of SO phonon modes have been investigated. The frequencies of the SO phonons are found...

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Bibliographic Details
Published inPhysics letters. A Vol. 372; no. 37; pp. 5932 - 5937
Main Author Zhong, Qing-Hu
Format Journal Article
LanguageEnglish
Published Elsevier B.V 08.09.2008
Subjects
Electron–phonon interaction
Optical phonon modes
Quantum wire
68.35.Ja
68.65.La
63.20.Kr
63.20.Dj
Quantum wire
Electron–phonon interaction
Optical phonon modes
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Summary:The confined longitudinal-optical (LO) phonon and surface-optical (SO) phonon modes of a free-standing quantum wire with ring geometry are discussed within the dielectric continuum (DC) approximation. Two branches of SO phonon modes have been investigated. The frequencies of the SO phonons are found to be dispersed and radius dependent for small size systems. When the wave vector q z → ∞ , the frequencies of each SO modes converge to the frequency values of the single planar heterostructure.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2008.07.051