Inelastic x-ray scattering study of collective electron excitations in MgB 2

S. Galambosi, J. A. Soininen, A. Mattila, S. Huotari, S. Manninen, G. Vankó, N. D. Zhigadlo, J. Karpinski, K. Hämäläinen

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We report an experimental inelastic x-ray scattering study of the collective electron excitations in MgB 2. Single-crystal and polycrystalline samples were used to study the free-electron-like (̃20 eV) plasmon and the recently theoretically predicted low energy (̃3 eV) plasmon mode. We present the energy-loss spectra for several momentum transfer values and find that the excitations exhibit a strong directional dependence. We discuss the dispersion of collective excitations and find a good agreement between the experimental results and the published theoretical calculations. Some discrepancies between the experimental data and the calculations were observed, namely slightly differing excitation energies and momentum-transfer dependence. However, these discrepancies are the same order of magnitude as the uncertainties within the various computational methods.

Original languageEnglish
Article number060504
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number6
DOIs
Publication statusPublished - Feb 2005

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Momentum transfer
x ray scattering
inelastic scattering
Scattering
X rays
Electrons
Excitation energy
Computational methods
Energy transfer
excitation
momentum transfer
Energy dissipation
electrons
Single crystals
free electrons
energy dissipation
energy transfer
single crystals
Uncertainty
energy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Inelastic x-ray scattering study of collective electron excitations in MgB 2 . / Galambosi, S.; Soininen, J. A.; Mattila, A.; Huotari, S.; Manninen, S.; Vankó, G.; Zhigadlo, N. D.; Karpinski, J.; Hämäläinen, K.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 71, No. 6, 060504, 02.2005.

Research output: Contribution to journalArticle

Galambosi, S, Soininen, JA, Mattila, A, Huotari, S, Manninen, S, Vankó, G, Zhigadlo, ND, Karpinski, J & Hämäläinen, K 2005, 'Inelastic x-ray scattering study of collective electron excitations in MgB 2 ', Physical Review B - Condensed Matter and Materials Physics, vol. 71, no. 6, 060504. https://doi.org/10.1103/PhysRevB.71.060504
Galambosi, S. ; Soininen, J. A. ; Mattila, A. ; Huotari, S. ; Manninen, S. ; Vankó, G. ; Zhigadlo, N. D. ; Karpinski, J. ; Hämäläinen, K. / Inelastic x-ray scattering study of collective electron excitations in MgB 2 In: Physical Review B - Condensed Matter and Materials Physics. 2005 ; Vol. 71, No. 6.
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