論文

査読有り
2002年4月

MULTISITE EFFECTS ON THE CORE-LEVEL PHOTOEMISSION IN Sr2RuO4

Surface Review and Letters
  • KOZO OKADA

09
02
開始ページ
1023
終了ページ
1027
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1142/s0218625x02003287
出版者・発行元
World Scientific Pub Co Pte Lt

Multi-Ru-site effects on the photoemission from the Ru 3d core level in Sr 2 RuO 4 are discussed on the basis of numerical diagonalization calculations for large-size cluster models. It is shown that the electrons on the Ru 4d ions neighboring the core-hole site participate actively in the core-hole screening, which indicates the importance of so-called "nonlocal screening" in Sr 2 RuO 4. However, since it occurs via the Ru 4d(xy)– O 2pπ bonding, the photoemission intensity which corresponds to the nonlocal screening is not large, compared with the Cu 2p photoemission in high-Tc-related cuprates. From the spectral analysis, the Coulomb interaction strength between Ru 4d electrons is estimated to be comparable with the width of Ru dε bands. In other words, Sr 2 RuO 4 belongs to a category of strongly correlated electron systems.

リンク情報
DOI
https://doi.org/10.1142/s0218625x02003287
URL
https://www.worldscientific.com/doi/pdf/10.1142/S0218625X02003287
ID情報
  • DOI : 10.1142/s0218625x02003287
  • ISSN : 0218-625X
  • eISSN : 1793-6667

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