Pressure Effect on the Boson Peak in Deeply Cooled Confined Water: Evidence of a Liquid-Liquid Transition
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PhysRevLett.115.235701.pdf
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Author(s)
Wang, Zhe
Kolesnikov, Alexander I.
Ito, Kanae
Podlesnyak, Andrey
Chen, Sow-Hsin
Date Issued
December 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Wang, Zhe, Alexander I. Kolesnikov, Kanae Ito, Andrey Podlesnyak, and Sow-Hsin Chen. "Pressure Effect on the Boson Peak in Deeply Cooled Confined Water: Evidence of a Liquid-Liquid Transition." Phys. Rev. Lett. 115, 235701 (December 2015). © 2015 American Physical Society
Version
Final published version
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.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.115.235701
