TY - JOUR
T1 - Dynamic susceptibility of supercooled water and its relation to the dynamic crossover phenomenon
AU - Zhang, Yang
AU - Lagi, Marco
AU - Fratini, Emiliano
AU - Baglioni, Piero
AU - Mamontov, Eugene
AU - Chen, Sow Hsin
PY - 2009/4/1
Y1 - 2009/4/1
N2 - We study the dynamic susceptibility χT (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 χT (Q,t) as the temperature is lowered toward the dynamic crossover temperature TL. Below TL, the peak height decreases steadily. We attribute this phenomenon to the change in slope of the Arrhenius plot of the translational relaxation time at TL. In contrast, the peak height of the calculated four-point correlation function χ4 (Q,t), directly related to the size of dynamic heterogeneity, increases toward and below TL.
AB - We study the dynamic susceptibility χT (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 χT (Q,t) as the temperature is lowered toward the dynamic crossover temperature TL. Below TL, the peak height decreases steadily. We attribute this phenomenon to the change in slope of the Arrhenius plot of the translational relaxation time at TL. In contrast, the peak height of the calculated four-point correlation function χ4 (Q,t), directly related to the size of dynamic heterogeneity, increases toward and below TL.
UR - http://www.scopus.com/inward/record.url?scp=65549163765&partnerID=8YFLogxK
U2 - 10.1103/PhysRevE.79.040201
DO - 10.1103/PhysRevE.79.040201
M3 - Article
AN - SCOPUS:65549163765
SN - 1539-3755
VL - 79
JO - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
JF - Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
IS - 4
M1 - 040201
ER -