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Dynamic susceptibility of supercooled water and its relation to the dynamic crossover phenomenon.
- Source :
-
Physical review. E, Statistical, nonlinear, and soft matter physics [Phys Rev E Stat Nonlin Soft Matter Phys] 2009 Apr; Vol. 79 (4 Pt 1), pp. 040201. Date of Electronic Publication: 2009 Apr 07. - Publication Year :
- 2009
-
Abstract
- We study the dynamic susceptibility chi_{T}(Q,t) of deeply supercooled water by means of quasielastic neutron scattering and molecular dynamics simulations. Both techniques show an increase in the peak height of chi_{T}(Q,t) as the temperature is lowered toward the dynamic crossover temperature T_{L} . Below T_{L} , the peak height decreases steadily. We attribute this phenomenon to the change in slope of the Arrhenius plot of the translational relaxation time at T_{L} . In contrast, the peak height of the calculated four-point correlation function chi_{4}(Q,t) , directly related to the size of dynamic heterogeneity, increases toward and below T_{L} .
Details
- Language :
- English
- ISSN :
- 1539-3755
- Volume :
- 79
- Issue :
- 4 Pt 1
- Database :
- MEDLINE
- Journal :
- Physical review. E, Statistical, nonlinear, and soft matter physics
- Publication Type :
- Academic Journal
- Accession number :
- 19518162
- Full Text :
- https://doi.org/10.1103/PhysRevE.79.040201