scholarly journals Anharmonicity, vibrational instability, and the Boson peak in glasses

2003 ◽  
Vol 67 (9) ◽  
Author(s):  
V. L. Gurevich ◽  
D. A. Parshin ◽  
H. R. Schober
Keyword(s):  
Boson Peak ◽  
Vibrational Instability

scholarly journals Vibrational instability, two-level systems, and the boson peak in glasses

2007 ◽  
Vol 76 (6) ◽  
Author(s):  
D. A. Parshin ◽  
H. R. Schober ◽  
V. L. Gurevich
Keyword(s):  
Boson Peak ◽  
Two Level Systems ◽  
Vibrational Instability

Low-temperature thermal conductivity and boson peak in the glassy g-As2S3

2016 ◽  
Vol 39 (0) ◽  
pp. 66-72
Author(s):  
В. Міца ◽  
О. Фегер ◽  
С. Петрецький ◽  
Р. Голомб ◽  
В. Ткач
Keyword(s):  
Thermal Conductivity ◽  
Low Temperature ◽  
Boson Peak

scholarly journals Boson peak and structural heterogeneity in ternary SiO 2 ‐Al 2 O 3 ‐B 2 O 3 glasses

2021 ◽  
Author(s):  
Mariana Fatobene Ando ◽  
Sindy Fuhrmann ◽  
Zhiwen Pan ◽  
Bruno Poletto Rodrigues ◽  
Tatsuya Mori ◽  
...  
Keyword(s):  
Structural Heterogeneity ◽  
Boson Peak

scholarly journals Terahertz and Microwave Optical Properties of Single-Crystal Quartz and Vitreous Silica and the Behavior of the Boson Peak

2021 ◽  
Vol 11 (15) ◽  
pp. 6733
Author(s):  
Mira Naftaly ◽  
Andrew Gregory
Keyword(s):  
Single Crystal ◽  
Silica Glass ◽  
Broad Band ◽  
Peak Frequency ◽  
Vitreous Silica ◽  
Peak Height ◽  
Fused Silica ◽  
Boson Peak ◽  
Single Crystal Quartz ◽  
Crystal Quartz

Z-cut single-crystal quartz and vitreous silica (silica glass or fused silica) were evaluated for use as reference materials for terahertz and microwave measurements of complex permittivity, with Z-cut quartz confirmed as being suitable. Measurements of refractive indices and absorption coefficients for o-ray and e-ray in quartz and for vitreous silica are reported at frequencies between 0.2 and 6 THz and at 36 and 144 GHz, and compared with data reported in the literature. A previously unreported broad band was seen in the extraordinary absorption of quartz. The Boson peak in silica glass absorption was examined, and for the first time, two negative relationships have been observed: between the refractive index and the Boson peak frequency, and between the Boson peak height and its frequency.

scholarly journals Boson peak in ultrathin alumina layers investigated with neutron spectroscopy

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
D. L. Cortie ◽  
M. J. Cyster ◽  
T. A. Ablott ◽  
C. Richardson ◽  
J. S. Smith ◽  
...  
Keyword(s):  
Boson Peak ◽  
Neutron Spectroscopy

scholarly journals The boson peak demystified?

Physics ◽  
2011 ◽  
Vol 4 ◽  
Author(s):  
Reiner Zorn
Keyword(s):  
Boson Peak

A Raman study of B203 through the liquid-glass transition range

1992 ◽  
Vol 02 ◽  
pp. C2-265-C2-270
Author(s):  
A. K. HASSAN ◽  
L. M. TORELL ◽  
L. BORJESSON
Keyword(s):  
Glass Transition ◽  
Correlation Length ◽  
Room Temperature ◽  
Vibrational Mode ◽  
Low Frequency ◽  
Boson Peak ◽  
Transition Range ◽  
Structural Correlation ◽  
Raman Study ◽  
Correlation Range

The low frequency Raman spectrum of B203 and the boroxol ring vibrational mode at 808 cm-1 have been studied from room temperature to 1273 K as the glass transforms to a melt. Both the low frequeney "boson" peak and the boroxol mode are markedly influenced by the glass transition. Raising the temperature above Tg the strength of the 808 cm-1 mode decreases linearly indicating the Similar behavior of the boroxol ring concentration. The boson peak shows a different temperature behavior, which mirrors that of the sound velo city. The structural correlation length demostrates the same correlation range in the liquid and the glass. The results, when compared with neutron diffraction measurements contradict a recently proposed relation between the "boson correlation length" and the position of the first sharp diffraction peak of the structure factor.

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