Poisson ratio and excess low-frequency vibrational states in glasses

被引:15
作者
Duval, Eugene [1 ]
Deschamps, Thierry [1 ]
Saviot, Lucien [2 ]
机构
[1] Univ Lyon 1, CNRS, UMR 5306, Inst Lumiere Mat, F-69622 Villeurbanne, France
[2] Univ Bourgogne, CNRS, UMR 6303, Lab Interdisciplinaire Carnot Bourgogne, F-21078 Dijon, France
关键词
BOSON PEAK; SCATTERING; BRILLOUIN; FRAGILITY; PRESSURE; LIQUIDS;
D O I
10.1063/1.4817778
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
In glass, starting from a dependence of the Angell's fragility on the Poisson ratio [V. N. Novikov and A. P. Sokolov, Nature 431, 961 (2004)], and a dependence of the Poisson ratio on the atomic packing density [G. N. Greaves, A. L. Greer, R. S. Lakes, and T. Rouxel, Nature Mater. 10, 823 (2011)], we propose that the heterogeneities are predominantly density fluctuations in strong glasses (lower Poisson ratio) and shear elasticity fluctuations in fragile glasses (higher Poisson ratio). Because the excess of low-frequency vibration modes in comparison with the Debye regime (boson peak) is strongly connected to these fluctuations, we propose that they are breathing-like (with change of volume) in strong glasses and shear-like (without change of volume) in fragile glasses. As a verification, it is confirmed that the excess modes in the strong silica glass are predominantly breathing-like. Moreover, it is shown that the excess breathing-like modes in a strong polymeric glass are replaced by shear-like modes under hydrostatic pressure as the glass becomes more compact. (C) 2013 AIP Publishing LLC.
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页数:4
相关论文
共 28 条
[1]   Emergence of Crystal-like Atomic Dynamics in Glasses at the Nanometer Scale [J].
Baldi, G. ;
Zanatta, M. ;
Gilioli, E. ;
Milman, V. ;
Refson, K. ;
Wehinger, B. ;
Winkler, B. ;
Fontana, A. ;
Monaco, G. .
PHYSICAL REVIEW LETTERS, 2013, 110 (18)
[2]   Fragility and compressibility at the glass transition [J].
Buchenau, U ;
Wischnewski, A .
PHYSICAL REVIEW B, 2004, 70 (09) :092201-1
[3]   Equivalence of the Boson Peak in Glasses to the Transverse Acoustic van Hove Singularity in Crystals [J].
Chumakov, A. I. ;
Monaco, G. ;
Monaco, A. ;
Crichton, W. A. ;
Bosak, A. ;
Rueffer, R. ;
Meyer, A. ;
Kargl, F. ;
Comez, L. ;
Fioretto, D. ;
Giefers, H. ;
Roitsch, S. ;
Wortmann, G. ;
Manghnani, M. H. ;
Hushur, A. ;
Williams, Q. ;
Balogh, J. ;
Parlinski, K. ;
Jochym, P. ;
Piekarz, P. .
PHYSICAL REVIEW LETTERS, 2011, 106 (22)
[4]   Correlation between boson peak and anomalous elastic behavior in GeO2 glass: An in situ Raman scattering study under high-pressure [J].
Deschamps, T. ;
Martinet, C. ;
de Ligny, D. ;
Bruneel, J. L. ;
Champagnon, B. .
JOURNAL OF CHEMICAL PHYSICS, 2011, 134 (23)
[5]   Boson peak and hybridization of acoustic modes with vibrations of nanometric heterogeneities in glasses [J].
Duval, E. ;
Mermet, A. ;
Saviot, L. .
PHYSICAL REVIEW B, 2007, 75 (02)
[6]   VIBRATIONAL DYNAMICS AND THE STRUCTURE OF GLASSES [J].
DUVAL, E ;
BOUKENTER, A ;
ACHIBAT, T .
JOURNAL OF PHYSICS-CONDENSED MATTER, 1990, 2 (51) :10227-10234
[7]   Merging of the acoustic branch with the boson peak in densified silica glass [J].
Foret, M ;
Vacher, R ;
Courtens, E ;
Monaco, G .
PHYSICAL REVIEW B, 2002, 66 (02) :242041-242046
[8]   Poisson's ratio and modern materials (vol 10, pg 823, 2011) [J].
Greaves, G. N. ;
Greer, A. L. ;
Lakes, R. S. ;
Rouxel, T. .
NATURE MATERIALS, 2011, 10 (12)
[9]  
Greaves GN, 2011, NAT MATER, V10, P823, DOI [10.1038/NMAT3134, 10.1038/nmat3134]
[10]  
Lamb H., 1881, P LOND MATH SOC, Vs1-13, P189, DOI 10.1112/plms/s1-13.1.189