Mechanism of THz dielectric constant enhancement in multi-component oxide glasses investigated by infrared and THz spectroscopies
Mechanism of THz dielectric constant enhancement in multi-component oxide glasses investigated by infrared and THz spectroscopies
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红外和太赫兹光谱研究多组分氧化物玻璃中太赫兹介电常数增强的机制
DOI:
10.1016/j.jpcs.2023.111237
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发表时间:
2022
影响因子:
4
通讯作者:
Ci-Ling Pan
中科院分区:
文献类型:
--
作者:
Osamu Wada;Doddoji Ramachari;Chan-Shan Yang;Yukihiro Harada;Takashi Uchino;Ci-Ling Pan
Dielectric properties of multi-component silicate oxide glasses are investigated with a focus on high dielectric constant oxyfluorosilicate (OFS) glasses by using the infrared reflection spectroscopy and terahertz (THz) time-domain spectroscopy. On the basis of multiple Lorentz oscillator model, vibrational parameters and most responsible ionic pairs are identified for major modes in OFS glasses. The lowest frequency mode is found to dominate the total THz dielectric strength. Among various glasses, the high frequency (optical) dielectric constant shows a superlinear dependence on the electronic polarizability of oxygens. In contrast, the low frequency (THz) mode contribution to the dielectric constant is enhanced by the ionicity (expressed by the polarization ionicity parameter) and exhibits an even steeper dependence on the electronic polarizability. This feature well explains the mechanism of attaining the highest THz dielectric constant in an OFS glass (e.g. ZNbKLSNd glass). Also, the oxygen ion effective charges bearing the lowest frequency modes of OFS glasses are evaluated and found to behave consistently with the polarization ionicity parameter, confirming the relevance of both of these parameters as good ionicity indicators.
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影响因子:
3.5
作者:
Osamu Wada;Doddoji Ramachari;Chan-Shan Yang;Ci-Ling Pan
通讯作者:
Ci-Ling Pan
DOI:
--
发表时间:
1984
期刊:
影响因子:
--
作者:
E. Kamitsos;W. Risen
通讯作者:
W. Risen
DOI:
10.1016/0022-3093(80)90126-x
发表时间:
1980
期刊:
影响因子:
--
作者:
J. Park;Haydn Chen
通讯作者:
Haydn Chen
DOI:
10.1016/0022-3093(91)90507-3
发表时间:
1991
期刊:
影响因子:
--
作者:
S. Morgan;D. Henderson;R. Magruder
通讯作者:
R. Magruder
影响因子:
3.9
作者:
Ravagli, A.;Naftaly, M.;Hewak, D. W.
通讯作者:
Hewak, D. W.