Origin of the boson peak in a network glass B2O3

被引：49

作者：

Engberg, D

Wischnewski, A

Buchenau, U

Börjesson, L

Dianoux, AJ

Sokolov, AP

Torell, LM

机构：

[1] Chalmers, Dept Expt Phys, S-41296 Gothenburg, Sweden

[2] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

[3] Chalmers, Dept Appl Phys, S-41296 Gothenburg, Sweden

[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW B | 1999年 / 59卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.59.4053

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report coherent inelastic neutron-scattering spectra for the network glass former B2O3, measured at temperatures from 100 to 1300 K (T-g similar to 525 K). At the first sharp diffraction peak, which stems from the van der Waals packing of layerlike units, one finds a correlated in-phase motion of these units at low frequency, and in addition a quasi-incoherent contribution for all temperatures. The contribution of the in-phase motion in the frequency range of the boson peak and the fast relaxations is significantly higher than the one expected for the sound waves.

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页码：4053 / 4057

页数：5

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