Plasma phase separation in bismuth and antimony chalcogenide crystals

摘要

Oscillation parameters of narrow band layered crystals of bismuth selenide and telluride and antimony telluride for one and two oscillations are calculated. The electron oscillation crystal model equations of real ε_τ and imaginary ε_τ ω_τ ε_τ components of dielectric function, electronic losses L, coL are given, special points of the optical functions ε_τ ω_τ ε_τ L coL for boundary frequencies co are probed. Ratios of energy balance of sublattices on the basis of oscillation electronic model are revealed. It is concluded that these crystals at high hydrostatic pressures and low temperatures are turned into superconductors. In high-temperature superconductors spontaneous division into two phases: superconducting and isolating was revealed. Stratification on two phases in superconducting crystals has been confirmed experimentally, neutron graphic, neutron spectral and spectral researches, an electronic and nuclear paramagnetic resonance.