Barrier influence on thermal, dynamic, and structural properties of two-minima systems
V. V. EremenkoPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Donetsk; Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. L. KovarskiĭPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Donetsk; Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovI. V. RubanPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Donetsk; Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovB. Ya. SukharevskiǐPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Donetsk; Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov
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Annotatsiya
Thermal, dynamic, and structural properties of two-minima systems with a barrier are considered by using the simplest model potentials. Averaging over the phase trajectories makes it possible to obtain the mean value of the cyclic frequency ⟨ω(E)⟩ and to separate the motion in the left- and right-wells. This allows a description of the metastable states with a particle localized permanently in one of the wells (glass). At temperatures of the order of barrier height, specific heat anomalies have been observed as well as a gently sloping minimum of ⟨ω⟩ and ⟨x2⟩, and the appearance of a central peak on the average probability density of a particle coordinate ⟨P(x)⟩ in the metastable state.
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