Strong enhancement of electron-phonon interaction due to charge fluctuations in oxide superconductors and their high Tc superconductivity

M. Tachiki, Saburo Takahashi, Y. Syono, Y. Namba, Y. Fukuda, M. Nagoshi

研究成果: Article査読

抄録

It is theoretically predicted that large charge fluctuations are induced in the copper oxides by the interplay of the electron transfer between Cu- and O-ions and the Coulomb interaction. The interaction between the charge fluctuations and the LO phonons strongly enhances the spectral density of the vibration in the metallic samples. This theoretical prediction was confirmed by electron energy loss spectroscopy; the loss intensity at the vibration frequency in the superconducting samples of YBa2Cu3O7-δ is much stronger than that in the non-superconducting samples. The enhancement of the spectral intensity effectively strengthens the electron-phonon interaction and causes the enhancement of Tc.

本文言語English
ページ(範囲)239-240
ページ数2
ジャーナルPhysica C: Superconductivity and its applications
153-155
PART 1
DOI
出版ステータスPublished - 1988 1 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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