Phonon density of states of silicon clathrates: Characteristic width narrowing effect with respect to the diamond phase

Physical Review B - Condensed Matter and Materials Physics

Volumn 59, Issue 15, 1999, Pages 10099-10104

  Melinon P ^a   Keghelian P ^a   Perez, A ^a   Champagnon, B ^a   Guyot, Y ^a   Saviot, L ^a   Reny, E ^b   Cros, C ^b   Pouchard, M ^b   Dianoux, A J ^c  

^a UNIVERSITÉ LYON 1   (France)

^b INST CHIM MATIERE COND BORDEAUX   (France)

^c INSTITUT LAUE LANGEVIN   (France)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 85044188558     PISSN: 01631829     EISSN: None     Source Type: Journal    
DOI: 10.1103/physrevb.59.10099     Document Type: Article

References (25)

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14. We used the terms "optical" and "acoustic" modes for convenience. In fact, optical and acoustic modes are strictly defined for specific wave vectors. Moreover, owing to the frustration in the clathrate lattice, the optic modes cannot be established. Nevertheless, the labeled "optic" and "acoustic" bands allow a simple comparison between the clathrate and the diamond lattices.
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