Large Elastic Anisotropy in Two-dimensional Layered GaS and GaSe Modulated by Copper Intercalation
Abstract
Brillouin scattering of bulk layered gallium sulfide (GaS) and gallium selenide (GaSe) grown using the Bridgman method were measured both as pristine materials and intercalated with copper and silver. The soundvelocities, refractive index, and four of the five independent elastic stiffnesses (cij) were determined. Values of the c11 elastic stiffness in thin crystals are higher than in previous measurements, bringing the elastic anisotropy (c11/c33) into a range typical of other layered materials. Copper intercalation showed a larger effect on acoustic phonons in GaS than GaSe.
Fields of Study & Subjects
Solid-state spectroscopy and crystallography
2D Materials and Applications
Advanced Thermoelectric Materials and Devices
Publication details
- Journal / source
- Institutional Repositories DataBase (IRDB)
- Volume
- 127
- Issue
- 26
- Publication date
- 5 January 2026
- Language
- EN