Confined phonons in glasses

被引：17

作者：

Asthalter, T ^{[1
]}

Bauer, M

van Bürck, U

Sergueev, I

Franz, H

Chumakov, AI

机构：

[1] Univ Stuttgart, Inst Phys Chem, D-70569 Stuttgart, Germany

[2] Tech Univ Munich, D-85747 Garching, Germany

[3] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[4] DESY, HASYLAB, D-22603 Hamburg, Germany

[5] Russian Res Ctr, Kurchatov Inst, Moscow 123182, Russia

来源：

EUROPEAN PHYSICAL JOURNAL E | 2003年 / 12卷 / Suppl 1期

关键词：

D O I：

10.1140/epjed/e2003-01-003-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have applied nuclear inelastic absorption (NIA) to the molecular glass former dibutyl phthalate/ferrocene, both in bulk and in nanoporous matrices having pore sizes of 50 and 25 Angstrom. The quantity g(E)/E-2, where g(E) is the vibrational density of states (VDOS) of the iron atoms, exhibits a pronounced maximum around 2 meV. Confinement in pores leads to a suppression of the VDOS below 1.5 meV, independent of the pore size. The influence of local interactions at the pore wall was assessed using Raman scattering. Our observations are discussed in the light of experimental and theoretical results on nanoparticles and for the Boson peak.

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收藏

页码：S9 / S12

页数：4

相关论文

共 28 条

[1] Length scale of cooperativity in the dynamic glass transition [J].

Arndt, M ;

Stannarius, R ;

Groothues, H ;

Hempel, E ;

Kremer, F .

PHYSICAL REVIEW LETTERS, 1997, 79 (11) :2077-2080

[2] Quasielastic nuclear forward scattering as a background-free probe of slow glass dynamics in confined geometries [J].

Asthalter, T ;

Sergueev, I ;

Franz, H ;

Rüffer, R ;

Petry, W ;

Messel, K ;

Härter, P ;

Huwe, A .

EUROPEAN PHYSICAL JOURNAL B, 2001, 22 (03) :301-306

[3] INTERACTION OF SOFT MODES AND SOUND-WAVES IN GLASSES [J].

BUCHENAU, U ;

GALPERIN, YM ;

GUREVICH, VL ;

PARSHIN, DA ;

RAMOS, MA ;

SCHOBER, HR .

PHYSICAL REVIEW B, 1992, 46 (05) :2798-2808

[4] Experimental aspects of inelastic nuclear resonance scattering [J].

Chumakov, AI ;

Sturhahn, W .

HYPERFINE INTERACTIONS, 1999, 123 (1-8) :781-808

[5] High-energy-resolution x-ray optics with refractive collimators [J].

Chumakov, AI ;

Rüffer, R ;

Leupold, O ;

Barla, A ;

Thiess, H ;

Asthalter, T ;

Doyle, BP ;

Snigirev, A ;

Baron, AQR .

APPLIED PHYSICS LETTERS, 2000, 77 (01) :31-33

[6] Inelastic light, neutron, and X-ray scattering related to the heterogeneous elasticity of glasses [J].

Duval, E ;

Saviot, L ;

Mermet, A ;

David, L ;

Etienne, S ;

Bershtein, V ;

Dianoux, A .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2002, 307 :103-108

[7] Phonons in nanocrystalline Ni3Fe [J].

Frase, H ;

Fultz, B ;

Robertson, JL .

PHYSICAL REVIEW B, 1998, 57 (02) :898-905

[8] Phonons in nanocrystalline Fe-57 [J].

Fultz, B ;

Ahn, CC ;

Alp, EE ;

Sturhahn, W ;

Toellner, TS .

PHYSICAL REVIEW LETTERS, 1997, 79 (05) :937-940

[9] Boson peak and high frequency modes in amorphous silica [J].

Guillot, B ;

Guissani, Y .

PHYSICAL REVIEW LETTERS, 1997, 78 (12) :2401-2404

[10] Finite size effects in simulations of glass dynamics [J].

Horbach, J ;

Kob, W ;

Binder, K ;

Angell, CA .

PHYSICAL REVIEW E, 1996, 54 (06) :R5897-R5900