OXYGEN OSCILLATIONS FOR HIGH-TEMPERATURE SUPERCONDUCTOR TRANSITION
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Publisher:Ohio State University
The pattern of the electron properties both crystals and their solutions has recently been described in terms of the classical model for the electron oscillations. The solution is considered as the supermolecule structure. The internal crystal field is taken into account by means of certain factor. In the case of parabolic bands electron is represented as the linear harmonic oscillator with frequency corresponded the direct transitions. In development of these ideas for the cases of strong and weak bonds the polyoscillator curves of real and imaginary components of dielectric function, electron loss, the absorption coefficients are calculated. The energy parameters of the YBaCuO superconductor and composing oxides with strong bonds are presented. For the high-temperature superconductor phase transition there are occurred valency bond breaking by temperature. With the temperature to phase transition one the maxima dielectric components, effective, natural, plasma frequencies are decreased. In the point of phase transition. To these values have not become zero because of finite quantity of the absorption band or the coefficient of the radiant friction. The energy gap in the point of the phase transition is equal zero. The role of the plasma oxygen oscillations in the process of the phase transition is proved. It is concluded that the potential barrier between semiconductor and superconductor phases is overcome by plasma oxygen energy Ep. The amplitudes of zero oxygen oscillations differ from those of the thermal oscillations by an order of magnitude. It is concluded that the system is formed for $T<Tc$ with the disturbance of the long-haul order. With the temperature for YBa2Cu3O6.5 plasma oxygen energy increase from Ep (0K)$=0.015-6.5\simeq 0.1$ cV to Ep $(293 K)\approx 2$ eV. The transition temperature increases as the square of the plasma frequency for superconductors. These conclusions are completely borne out by measurements. The plasma and gap energies of the superconductor, possessed the room temperature of the phase transition are estimated.
Author Institution: Department of Physics, Moscow M.V. Lomonosov State University
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