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

被引：57

作者：

Mélinon, P ^{[1
]}

Kéghélian, P

Perez, A

Champagnon, B

Guyot, Y

Saviot, L

Reny, E

Cros, C

Pouchard, M

Dianoux, AJ

机构：

[1] Univ Lyon 1, Dept Mat Phys, F-69622 Villeurbanne, France

[2] Univ Bordeaux 1, Inst Chim Mat Condensee Bordeaux, F-33608 Pessac, France

[3] Inst Laue Langevin, Grenoble 9, France

[4] Univ Lyon 1, Lab Phys Chim Mat Luminescents, F-69622 Villeurbanne, France

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.59.10099

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The phonon density of states of different silicon clathrate phases is measured by inelastic neutron scattering. M-x @ Si-34 and M-x @ Si-46 clathrates with different alkaline (M = Na, K) and composition x are investigated. A width-narrowing effect is observed on the phonon spectra with respect to the diamond silicon structure. The effect of the alkali atom-silicon atom coupling is seen demonstrating the strong interaction between the alkali-atom and the host silicon cage. Such specific properties of clathrate lattices are interpreted in term of local icosahedral symmetry. [S0163-1829(99)02415-7].

引用

页码：10099 / 10104

页数：6

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