Pressure Effect on the Boson Peak in Deeply Cooled Confined Water: Evidence of a Liquid-Liquid Transition

Zhe Wang, Alexander I. Kolesnikov, Kanae Ito, Andrey Podlesnyak, Sow Hsin Chen

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

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.

Original languageEnglish
Article number235701
JournalPhysical Review Letters
Volume115
Issue number23
DOIs
StatePublished - Dec 3 2015

Fingerprint

Dive into the research topics of 'Pressure Effect on the Boson Peak in Deeply Cooled Confined Water: Evidence of a Liquid-Liquid Transition'. Together they form a unique fingerprint.

Cite this