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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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 Urheber:
Koza, Michael Marek1, Autor
Boehm, Martin1, Autor
Sischka, Erik2, Autor           
Schnelle, Walter3, Autor           
Mutka, Hannu1, Autor
Leithe-Jasper, Andreas4, Autor           
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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 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2015-01-16
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: 14847129
DOI: 10.1103/PhysRevB.91.014305
 Art des Abschluß: -

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Titel: Physical Review B
  Kurztitel : Phys. Rev. B
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Woodbury, NY : American Physical Society
Seiten: - Band / Heft: 91 (1) Artikelnummer: 014305 Start- / Endseite: 1 - 8 Identifikator: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008