AbstractView references

Anisotropy in the thermal and electronic properties for two directions of a thermal wave propagation in GeSe₂ single crystal was investigated using the photoacoustic frequency transmission technique. First, the electric field of an incident polarized light beam was adjusted to be perpendicular to the "c" axis (E₁ ⊥ c), and then parallel to it (E₁//c). It is shown that there is an obvious difference in the PA amplitude and phase spectra of the same sample, for cases when E₁//c and E₁ ⊥ c axis. The results for thermal diffusivity D_T obtained by fitting procedure for these two orientations of the electric field with regard to the "c" axis, are calculated: D_T// = 1.1 × 10^-2 and D_T⊥ = 1.7 × 10^-3 cm²/s, e.g. their ratio is 6.6. The electronic transport parameters are also given: the carrier ambipolar diffusion coefficient D// = 1.5 cm²/s and D⊥ = 2.5 cm²/s.