TY - JOUR
T1 - Pressure Effect on the Boson Peak in Deeply Cooled Confined Water
T2 - Evidence of a Liquid-Liquid Transition
AU - Wang, Zhe
AU - Kolesnikov, Alexander I.
AU - Ito, Kanae
AU - Podlesnyak, Andrey
AU - Chen, Sow Hsin
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/12/3
Y1 - 2015/12/3
N2 - The boson peak in deeply cooled water confined in nanopores is studied to examine the liquid-liquid transition (LLT). Below ∼180 K, the boson peaks at pressures P higher than ∼3.5 kbar are evidently distinct from those at low pressures by higher mean frequencies and lower heights. Moreover, the higher-P boson peaks can be rescaled to a master curve while the lower-P boson peaks can be rescaled to a different one. These phenomena agree with the existence of two liquid phases with different densities and local structures and the associated LLT in the measured (P, T) region. In addition, the P dependence of the librational band also agrees with the above conclusion.
AB - The boson peak in deeply cooled water confined in nanopores is studied to examine the liquid-liquid transition (LLT). Below ∼180 K, the boson peaks at pressures P higher than ∼3.5 kbar are evidently distinct from those at low pressures by higher mean frequencies and lower heights. Moreover, the higher-P boson peaks can be rescaled to a master curve while the lower-P boson peaks can be rescaled to a different one. These phenomena agree with the existence of two liquid phases with different densities and local structures and the associated LLT in the measured (P, T) region. In addition, the P dependence of the librational band also agrees with the above conclusion.
UR - http://www.scopus.com/inward/record.url?scp=84949674384&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.115.235701
DO - 10.1103/PhysRevLett.115.235701
M3 - Article
AN - SCOPUS:84949674384
SN - 0031-9007
VL - 115
JO - Physical Review Letters
JF - Physical Review Letters
IS - 23
M1 - 235701
ER -