Continuum model for the terahertz dielectric response of glasses
Abstract
Boson peak dynamics in glasses produce a robust crossover in the terahertz (THz) dielectric response that standard Debye or Lorentz models do not capture. We develop a continuum description of this THz response, coupling an infrared-effective charge fluctuation spectrum to a frequency-dependent shear modulus, and apply it to glycerol glass. The model reproduces the measured complex dielectric function and the nearly linear infrared light-vibration coupling around the boson peak, and it highlights the dominant role of transverse shear dynamics.
Fields of Study & Subjects
Material Dynamics and Properties
Glass properties and applications
Terahertz technology and applications
Publication details
- Journal / source
- Institutional Repositories DataBase (IRDB)
- Volume
- 114
- Issue
- 7
- Publication date
- 7 February 2026
- Language
- EN