Oxygen 1s core-level photoemission as a tool to investigate the unoccupied electronic states of cuprates

Kozo Okada, Akio Kotani

研究成果査読

6 被引用数 (Scopus)

抄録

We theoretically show that the oxygen 1s x-ray photoelectron spectrum (O 1s XPS) directly refelcts the unoccupied part of the electronic states of strongly correlated oxides. On the basis of numerically exact diagonalization calculations performed using a finite-size cluster model, we study the electron- or hole-doping dependence of the O 1s XPS of two-dimensional copper compounds in detail. The O 1s XPS has a weak charge-transfer (CT) satellite structure, which is located at about 10 eV above the main line. In this CT final state, an O 2p valence electron ejected by the O 1s core hole potential is transferred to the conduction states. Thus, the line shape of the CT satellite reflects the upper Hubbard band for electron-doped or undoped cuprates and also the Zhang-Rice singlet band for hole-doped cuprates.

本文言語English
論文番号123703
ジャーナルjournal of the physical society of japan
75
12
DOI
出版ステータスPublished - 12月 2006

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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