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perovskitelike superconductors 3 3 Classification of vibrations in perovskitelike super
Phonons and the mechanism of hightemperature
4 The critical temperature of the superconducting tran
5 other sections not shown
absorption analysis anisotropy antiferromagnetic atoms axis band Brillouin zone calculations centers characteristic coefficient components compounds concentration conduction band corresponding curve decrease defects density described determined diffraction displacements dynamic Eksp electric field electron energy equation excitation excitons Faraday effect Fermi ferroelectric ferromagnetic field effect films frequency high-temperature high-temperature superconductivity hysteresis impurity increase interaction investigations ions JETP lattice layers Lett lines luminescence magnetic field measured metal method modes Mossbauer Mossbauer spectroscopy observed obtained optical oxides oxygen parameters permittivity perovskitelike superconductors Petersburg phase transition phonon Phys Physics plane polarization possible potential properties Raman rare-earth region Russian samples scattering single crystals solid solutions space group spectra spectrum spin structure substrate superlattice surface symmetry Table Tela Leningrad Tela St temperature dependences Teor theory thickness tion Tverd valence valence band values vector velocity vibrations wave functions width x-ray YBCO