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Creators/Authors contains: "Paulo-Wach, Daniel"

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  1. ; ; ; ; (, Applied Physics Letters)
    Brillouin scattering of bulk layered hexagonal gallium sulfide (GaS) and gallium selenide (GaSe) was measured both as pristine materials and intercalated with copper and silver. The sound velocities, 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 in GaSe. 
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    Free, publicly-accessible full text available December 29, 2026