title: Boson peak in deeply cooled confined water: a possible way to explore the existence of the liquid-to-liquid transition in water.
abstract: The boson peak in deeply cooled water confined in nanopores is studied with inelastic neutron scattering. We show that in the (P, T) plane, the locus of the emergence of the boson peak is nearly parallel to the Widom line below ∼ 1600 bar. Above 1600 bar, the situation is different and from this difference the end pressure of the Widom line is estimated. The frequency and width of the boson peak correlate with the density of water, which suggests a method to distinguish the hypothetical "low-density liquid" and "high-density liquid" phases in deeply cooled water.
authors: Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: Zhe
authors: Z
authors: Wang
authors: Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA and Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan, Republic of China.
authors: Kao-Hsiang
authors: KH
authors: Liu
authors: Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: Peisi
authors: P
authors: Le
authors: Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: Mingda
authors: M
authors: Li
authors: Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: Wei-Shan
authors: WS
authors: Chiang
authors: NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
authors: Juscelino B
authors: JB
authors: Leão
authors: NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
authors: John R D
authors: JR
authors: Copley
authors: NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA and Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA.
authors: Madhusudan
authors: M
authors: Tyagi
authors: Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors: Andrey
authors: A
authors: Podlesnyak
authors: Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
authors: Alexander I
authors: AI
authors: Kolesnikov
authors: Department of Chemistry, National Taiwan University, Taipei 106, Taiwan, Republic of China.
authors: Chung-Yuan
authors: CY
authors: Mou
authors: Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors: Sow-Hsin
authors: SH
authors: Chen
mesh_terms: D003080:Cold Temperature; D008956:Models, Chemical; D058608:Nanopores; D033363:Neutron Diffraction / Q000379:methods*; D044367:Phase Transition; D014867:Water / Q000737:chemistry*
chemical_list: D014867:Water