Photoemission study of Bi2(Sr,Ca)3Cu2Oy

A. Fujimori, S. Takekawa, E. Takayama-Muromachi, Y. Uchida, A. Ono, T. Takahashi, Y. Okabe, H. Katayama-Yoshida

Research output: Contribution to journalArticle

105 Citations (Scopus)

Abstract

The electronic structure of Bi2(Sr,Ca)3Cu2Oy has been studied by photoemission and electron-energy-loss spectroscopy (EELS). From analysis of the Cu 2p core-level photoemission spectra, the Cu 3d-O 2p bond in the CuO2 layer is found to be more ionic than that in La2-xSrxCuO4 and YBa2Cu3Oy, which leads to a weaker superexchange coupling between the Cu2+ spins within the layer. Valence-band photoemission and EELS spectra suggest a significant shift of the Bi 6s contribution from the deep-lying Bi 6s-O 2p bonding states to the antibonding states in the O 2p band region as compared to the results of band-structure calculations on Bi2Sr2CaCu2O8. This is probably due to excess oxygen atoms around Bi, which may raise the Bi 6s orbital energy and provide the system with holes.

Original languageEnglish
Pages (from-to)2255-2260
Number of pages6
JournalPhysical Review B
Volume39
Issue number4
DOIs
Publication statusPublished - 1989 Jan 1

ASJC Scopus subject areas

  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Photoemission study of Bi2(Sr,Ca)3Cu2Oy'. Together they form a unique fingerprint.

  • Cite this

    Fujimori, A., Takekawa, S., Takayama-Muromachi, E., Uchida, Y., Ono, A., Takahashi, T., Okabe, Y., & Katayama-Yoshida, H. (1989). Photoemission study of Bi2(Sr,Ca)3Cu2Oy. Physical Review B, 39(4), 2255-2260. https://doi.org/10.1103/PhysRevB.39.2255