Optic phonons and the soft mode in 2H-NbSe2

We present an investigation of the lattice dynamics of the charge-density-wave compound 2H-NbSe2. We analyze the precise nature of the wave vector dependent electron-phonon coupling (EPC) and derive the bare dispersion of the charge-density-wave (CDW) soft phonon mode using inelastic x-ray scatterin...

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Bibliographic Details
Published in:arXiv.org 2013-05
Main Authors: Weber, F, Hott, R, Heid, R, K -P Bohnen, Rosenkranz, S, J -P Castellan, Osborn, R, A H Said B M Leu, Reznik, D
Format: Article
Language:English
Subjects:
Charge density waves
Fermi surfaces
Inelastic scattering
Lattice vibration
Mathematical analysis
Phonons
X-ray scattering
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Summary:We present an investigation of the lattice dynamics of the charge-density-wave compound 2H-NbSe2. We analyze the precise nature of the wave vector dependent electron-phonon coupling (EPC) and derive the bare dispersion of the charge-density-wave (CDW) soft phonon mode using inelastic x-ray scattering combined with ab-initio calculations. Experimentally, phonon modes along the {\Gamma} - M line, i.e. q = (h, 0, 0) with 0
ISSN:2331-8422
DOI:10.48550/arxiv.1303.6503