2002年4月
MULTISITE EFFECTS ON THE CORE-LEVEL PHOTOEMISSION IN Sr2RuO4
Surface Review and Letters
- 巻
- 09
- 号
- 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
- ID情報
-
- DOI : 10.1142/s0218625x02003287
- ISSN : 0218-625X
- eISSN : 1793-6667