Spin-polarized electronic structure of cobalt cluster anions studied by photoelectron spectroscopy

Hiroyuki Yoshida, Akira Terasaki, Katsuyoshi Kobayashi, Masaru Tsukada, Tamotsu Kondow

研究成果: Contribution to journalArticle査読

61 被引用数 (Scopus)

抄録

The photoelectron spectra of Con - (3≤n≤70) were measured at the photon energy of 4.025 eV by use of a XeCl excimer laser. For Con - with n= 3, 4, and 6, the geometric and electronic structures were obtained from the spectra in comparison with the calculated spectra by the spin-polarized DV-Xα method. The spectra observed are reproduced reasonably well by the calculation with postulating the most probable geometrical structures. It is revealed that the 3d band with the majority spin is separated by 1.0-2.8 eV from that with the minority spin; the former is completely filled while the latter is partly filled and extends above Fermi level. The magnetic moments and the average exchange energies of these cluster anions were estimated. For Con - with n≥7, the observed electron affinity depends linearly on the reciprocal of the cluster radius and approach the work function of a cobalt metal, as n increases. Below n = 6, the electron affinity deviates from the linear dependence. This finding indicates that a size-dependent transition in the electronic structure occurs at n≃-7. The spherical conducting drop model suggests the presence of mobile electrons in Con - with n≥7.

本文言語英語
ページ(範囲)5960-5965
ページ数6
ジャーナルThe Journal of Chemical Physics
102
15
DOI
出版ステータス出版済み - 1 1 1995
外部発表はい

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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