Bulg. J. Phys. vol.28 no.1-2 (2001), pp. 63-75



Renormalized Phonon Frequencies and Electric Resistivity Along the c-axis in Single-plane High-temperature Superconductors. A Double-well Analysis

M. Georgiev1, M. Ivanovich1, I. Polyanski1, P. Petrova2, S. Tsintsarska3, A. Gochev4
1Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd, 1784 Sofia, Bulgaria
2Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd, 1784 Sofia, Bulgaria
3Central Laboratory for Photoprocesses, Bulgarian Academy of Sciences, Sofia, Bulgaria
4Chemical Abstract Service, Columbus, Ohio 43220, USA
Abstract. We consider the dynamic interlayer charge transfer across apex oxygens between CuO2 planes in single-layered high-Tc superconductors. Phonon-coupled axial transfer rates are derived by means of the reaction-rate method. They lead straightforwardly to temperature dependences for the axial resistivity. Doping and temperature dependences are also derived for the renormalized frequencies of phonon modes coupled to the interlayer charge transfer. Our results are compared with experimentally observed dependences.

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