Electronic and Magnetic Structures in O/Cr(001) Surface from Angle-Resolved Photoemission Spectroscopy

DOI Web Site 参考文献18件
  • Hideki Nakajima
    Synchrotron Light Research Institute (Public Organization), 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand
  • Supakorn Pukird
    Department of Physics, Ubon Ratchathani University, Ubon Ratchathani 34190, Thailand
  • Wichuda Boonyaratgalin
    Department of Physics, Srinakharinwirot University, Wattana, Bangkok 10110, Thailand
  • Takehiko Ishii
    School of Physics, Suranaree University of Technology, 111 University Avenue, Muang District, Nakhon Ratchasima 30000, Thailand
  • Tomohiko Saitoh
    Department of Applied Physics, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan
  • Akito Kakizaki
    Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan

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説明

We measured the angle-resolved photoemission spectra of Cr(001) surface with and without oxygen adsorption to study the surface and interfacial electronic structures in relation to its magnetism. The experimental results show that the surface states and Cr 3 d –O 2 p interfacial state are found near the Fermi level, and they are responsible to the surface ferromagnetism of Cr(001). The energy band dispersion of this interfacial state indicates the odd symmetry with respect to the mirror plane (010), and originates from the 3 d x y –2 p y antibonding state. It was found that the fully occupied antibonding state leading to the negative surface relaxation results in the enhancement of magnetic moments in O/Cr(001). This magneto-volume effect also realized that the energy band width of O/Cr(001) is at most 50% less than that of clean Cr(001) surface.

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