Boson Peak Investigation of LiCl-H2O System Using Terahertz Time-Domain Spectroscopy

The complex dielectric constant of 17.3 mol% lithium chloride aqueous solution, which is a typical hydrogen-bonded glass system, was determined from 291 K to 14 K using terahertz time-domain spectroscopy. The boson peak appeared at 1.3 THz at 14 K, suggesting that the determinant of boson peak frequency is hydrogen bonds between water molecules.

Automated summary

The complex dielectric constant of a lithium chloride aqueous solution was determined at low temperatures using terahertz time-domain spectroscopy, revealing that the boson peak frequency is determined by hydrogen bonds between water molecules.