Angle-Resolved Photoemission Spectroscopy Study of Metal/Oxide Interface-Valence Band Structure of Cu Adsorbed Polar ZnO Surfaces-

• OZAWA Kenichi

  Department of Chemistry and Materials Science, Tokyo Institute of Technology

• OBA Yukako

  Department of Chemistry, Rikkyo University

• EDAMOTO Kazuyuki

  Department of Chemistry, Rikkyo University

• SOGO Mauo

  Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo

Bibliographic Information

Other Title

• 角度分解光電子分光による金属／酸化物界面の研究―Ｃｕ吸着ＺｎＯ極性表面の価電子バンド構造―
• カクド ブンカイ コウデンシ ブンコウ ニ ヨル キンゾク サンカブツ カイメン ノ ケンキュウ Cu キュウチャク ZnO キョクセイ ヒョウメン ノ カデンシ バンド コウゾウ
• —Valence Band Structure of Cu Adsorbed Polar ZnO Surfaces—
• —Cu吸着ZnO極性表面の価電子バンド構造—

Abstract

Angle-resolved photoemission measurements are carried out to investigate the valence electronic structures of two different ZnO surfaces that are (0001) Zn-terminated (ZnO-Zn) and (000-1) O-terminated (ZnO-O) surfaces, and also of Cu clusters supported on these surfaces. On the clean ZnO surfaces, two valence bands are observed at ∼4 and 5−8 eV with a clear dispersion feature. Although these bands are associated with the bulk bands, it is found that the dispersion widths of the bands exhibit the termination dependence of the polar ZnO surfaces. Deposition of Cu on the polar ZnO surfaces induces downward bending of the ZnO band. Magnitude of Cu-induced bending is larger on ZnO-O than on ZnO-Zn. This indicates that the Cu—ZnO interface interaction is greater for the Cu/ZnO-O system than for the Cu/ZnO-Zn system. The analysis of the Cu 3d band structure implies that coupling between the Cu 3d band and the ZnO band is operative at the Cu—ZnO-O interface, whereas such coupling seems to be missing at the Cu—ZnO-Zn interface. We propose that the effect of electronic coupling is one of the factors that determine the interface interaction between the Cu cluster and polar ZnO surfaces.

Journal

• Hyomen Kagaku

  Hyomen Kagaku 29 (7), 407-412, 2008

  The Surface Science Society of Japan

Keywords

• angle-resolved photoemission spectroscopy (ARPES)
• valence band structure
• zinc oxide (ZnO)
• copper (Cu)
• polar oxide surface

Details

• CRID: 1390282681434992512
• NII Article ID: 10021166518
• NII Book ID: AN00334149
• DOI: 10.1380/jsssj.29.407
• ISSN: 18814743
• ISSN: 03885321
• NDL BIB ID: 9576473
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9576473
• Web Site: http://www.jstage.jst.go.jp/article/jsssj/29/7/29_7_407/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed