Raman Scattering Studies in Squaric Acid under the Uniaxial Stress

抄録

Uniaxial stress effect on optic modes in squaric acid was studies by Raman scattering. The out-of-plane librational modes (Bg species lines near 150 cm⁻¹) and the translational mode (Bg species line at 158 cm⁻¹) are found to be sensitive to a uniaxial stress applied along the b axis, but the in-plane librational mode (Ag species line at 238 cm⁻¹) and several internal modes are not. These results are discussed in relation to the two dimensional character of the layered structure of the compound.