Role of Phonon Having a Change in Coordination Number of Vibrating Ion in High-T_c Oxide Superconductors

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概要

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• For those high-7'. Cu-oxides wh.ose crystalline unit is composed of a metal (M.)sheet sandwiched by two pyramidal Cub, planes, a phonon-mecliated superconduc-tivity model is proposed in whi<:h a phonon having a change in the coordinationnumber of a vibrating ion induces a charge-density wave in the Cub. plane. The elec-iron-phonon coupling constant in this mechanism is estimated and is shown toresonably reproduce the observed d In T./ din r valtme given earlier (J. Phys. Soc.Jpn. 60 (1991) 3 194) on the basis of the Eliashberg theory, where r denotes the M.-0bond length.thigh-'7'.Cu-oxides, phonon-mediated superconductivity, covalency, charge-den- lj sity wave, coordination numberI

• 社団法人日本物理学会の論文
• 1992-05-15

著者

• Motida Kiyoshi

  Department Of Physics Faculty Of Science Hokkaido University

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• Role of Phonon Having a Change in Coordination Number of Vibrating Ion in High-T_c Oxide Superconductors

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