Features of low-temperature phonon scattering in materials with disclination inclined-type loops

One studies scattering of phonons by fields of static stresses of a round V-shaped disclination loop in terms of the deformation potential method. Numerical calculations of the average free path l and thermal conductivity χ showed that within low temperature range there was a minimum in χ temperature dependence at T* certain temperature. With temperature decrease under T < T* χ increases abruptly, as T-3, while under T > T* with temperature increase it varies dislocationally (χ ∼ T2). The results derived for V-shaped disclination loop are compared with data for single-axle disclination dipole. Single-axle disclination dipoles as sources of phonon scattering are shown to be close to the V-shaped disclination loop in properties