深过冷受限水中的玻色峰：探索水中液-液相变存在的一种可能途径。
Boson peak in deeply cooled confined water: a possible way to explore the existence of the liquid-to-liquid transition in water.
机构信息
Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
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.
出版信息
Phys Rev Lett. 2014 Jun 13;112(23):237802. doi: 10.1103/PhysRevLett.112.237802. Epub 2014 Jun 12.
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.
利用非弹性中子散射研究了深冷却水中被限制在纳米孔中的玻色峰。我们表明，在（P，T）平面上，玻色峰出现的轨迹几乎与 ∼ 1600 巴以下的 Widom 线平行。在 1600 巴以上，情况则有所不同，从这种差异可以估计 Widom 线的末端压力。玻色峰的频率和宽度与水的密度相关，这表明了一种区分深冷水中假设的“低密度液体”和“高密度液体”相的方法。
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