Report
Water and Ice Dielectric Spectra Scaling at 0 {\deg}C
| العنوان: | Water and Ice Dielectric Spectra Scaling at 0 {\deg}C |
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| المؤلفون: | Artemov, V. G., Volkov, A. A. |
| المصدر: | Ferroelectrics, 466 (2014) 158-165 |
| سنة النشر: | 2013 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Soft Condensed Matter, Condensed Matter - Disordered Systems and Neural Networks |
| الوصف: | Dielectric spectra (10^4-10^11 Hz) of water and ice at 0 {\deg}C are considered in terms of proton conductivity and compared to each other. In this picture, the Debye relaxations, centered at 1/{\tau}_W ~ 20 GHz (in water) and 1/{\tau}_I ~ 5 kHz (in ice), are seen as manifestations of diffusion of separated charges in the form of H3O+ and OH- ions. The charge separation results from the self-dissociation of H2O molecules, and is accompanied by recombination in order to maintain the equilibrium concentration, N. The charge recombination is a diffusion-controlled process with characteristic lifetimes of {\tau}_W and {\tau}_I, for water and ice respectively. The static permittivity, {\epsilon}(0), is solely determined by N. Both, N and {\epsilon}(0), are roughly constant at the water-ice phase transition, and both increase, due to a slowing down of the diffusion rate, as the temperature is lowered. The transformation of the broadband dielectric spectra at 0 {\deg}C with the drastic change from {\tau}_W to {\tau}_I is mainly due to an abrupt (by 0.4 eV) change of the activation energy of the charge diffusion. Comment: 4 pages, 3 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1080/00150193.2014.895216 |
| URL الوصول: | http://arxiv.org/abs/1308.1229 |
| رقم الانضمام: | edsarx.1308.1229 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1080/00150193.2014.895216 |
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