Vibrational characteristics of the niobium dichalcogenide. Bulk samples and nanofilms

A model of the niobium diselenide crystal lattice has been proposed. This model sufficiently describes the vibrational characteristics of both bulk samples and nanofilms with a thickness beyond one three-layered structural element. Calculation of the local Green functions and mean-squared atom ampli...

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Bibliographic Details
Published inSuperlattices and microstructures Vol. 45; no. 6; pp. 564 - 575
Main Authors Galetich, I.K., Gospodarev, I.A., Grishaev, V.I., Eremenko, A.V., Kravchenko, K.V., Sirenko, V.A., Feodosyev, S.B.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.06.2009
Subjects
Green function
Ioffe–Regel crossover
Jacobi matrix method
Nano-scale structure
Phonon spectra
Transition metals dichalcogenides
Jacobi matrix method
Ioffe–Regel crossover
Phonon spectra
Green function
Transition metals dichalcogenides
Nano-scale structure
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Summary:A model of the niobium diselenide crystal lattice has been proposed. This model sufficiently describes the vibrational characteristics of both bulk samples and nanofilms with a thickness beyond one three-layered structural element. Calculation of the local Green functions and mean-squared atom amplitudes have been performed using the Jacobi-matrix method. Phonon density of states features stipulated by acoustic branches and low-frequency low-dispersion optical modes cross-over have been analyzed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0749-6036
1096-3677
DOI:10.1016/j.spmi.2009.03.008