On lattice dynamics of layered HTS cuprates and related compounds

Vibrational spectra of crystal lattice and partial vibrational spectra of copper atoms in the compounds of the bismuth homologous series of HTS cuprates and in the parent phase CA Cu O2 have been investigated by the neutron inelastic scattering. It is shown that the main force atomic interactions in the - Ca - Cu O2 - and Bi O- Sr O- blocks of the compounds are conserved. The dynamical behavior of the copper atoms is defined mainly by their interaction with the nearest oxygen atoms in the -Cu O2-layer