Breakdown of the Stokes-Einstein relation in supercooled liquids
Yükleniyor...
Dosyalar
Tarih
2004
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Trans Tech Publications Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Breakdown of the Einstein-Stokes relation in undercooled liquids is one of the unsolved problems in the theory of liquids. The self-diffusion coefficient follows the temperature dependence of the Einstein-Stokes equation D = kT / 6pietar at high temperatures but only down to approximately 1.2T(g) (T-g - glass-temperature). Below 1.2T(g) the temperature behavior of the diffusion coefficient is weaker than 1/eta. In the present study we show that this is a consequence of increasing correlations in the Brownian motion of the constituting particles of the liquid. We derive a relation, which includes the Einstein-Stokes equation as a limiting case for high temperatures.
Açıklama
Anahtar Kelimeler
Atomic mobility, Brownian motion, Diffusion in liquids, Glass-transition, Stokes-Einstein relation, Supercooled liquids, Viscosity, Vogel-Tamman-Fulcher law, Glass-Transition, Diffusion
Kaynak
Journal of Metastable and Nanocrystalline Materials
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
20-21
Sayı
Künye
Dimitrov, V. I. (2004). Breakdown of the Stokes-Einstein relation in supercooled liquids. Journal of Metastable and Nanocrystalline Materials, 20-21, 541-545. doi:10.4028/www.scientific.net/JMNM.20-21.541
