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  Low-energy phonon dispersion in LaFe4Sb12

Koza, M. M., Boehm, M., Sischka, E., Schnelle, W., Mutka, H., & Leithe-Jasper, A. (2015). Low-energy phonon dispersion in LaFe4Sb12. Physical Review B, 91(1): 014305, pp. 1-8. doi:10.1103/PhysRevB.91.014305.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-BF99-D Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-BF9A-B
Genre: Journal Article

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 Creators:
Koza, Michael Marek1, Author
Boehm, Martin1, Author
Sischka, Erik2, Author              
Schnelle, Walter3, Author              
Mutka, Hannu1, Author
Leithe-Jasper, Andreas4, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863404              
3Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863441              
4Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863406              

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 Abstract: We studied the vibrational dynamics of a single crystal of LaFe 4Sb 12 by three-axis inelastic neutron spectroscopy. The dispersion of phonons with wave vectors q along [xx0] and [xxx] directions in the energy range of eigenmodes with high amplitudes of lanthanum vibrations, i.e., at planckomegalsim12 meV is identified. Symmetry-avoided anticrossing dispersion of phonons is established in both monitored directions and distinct eigenstates at high-symmetry points and at the Brillouin-zone center are discriminated. The experimentally derived phonon dispersion and intensities are compared with and backed up by ab initio lattice dynamics calculations. Results of the computer model match well with the experimental data.

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Language(s): eng - English
 Dates: 2015-01-16
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 14847129
DOI: 10.1103/PhysRevB.91.014305
 Degree: -

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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 91 (1) Sequence Number: 014305 Start / End Page: 1 - 8 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008