Site-Specific Orbital Angular Momentum Analysis of Graphite Valence Electron Using Photoelectron Forward Focusing Peaks(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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Two-dimensional photoelectron intensity angular distributions of the graphite valence band were measured using circularly polarized soft X-ray with a photon energy of 500eV. Photoelectron intensity from the bottom of the 2s band was observed at the Γ point of every other Brillouin zone reflecting the photoelectron structure factor, that corresponds to the interference of photoelectron waves from 2s atomic orbitals within a unit cell. Simultaneously, the circular dichroism of photoelectron forward focusing peak rotation around the incident-light axis was observed. This rotation in the photoelectron intensity angular distribution from the 2p_<xy> band was about twice those from 2s and 2p_z bands, reflecting the difference in orbital angular momentum of each band. Taking advantage of the forward focusing peak as a site-specific probe, the local orbital angular momentum of each valence band was analyzed. The origin of the dual behavior that appeared in the observation of local angular momentum from a delocalized valence band is discussed in conjunction with the dispersion and spatial origin of the electron.
- 社団法人日本物理学会の論文
- 2007-01-15
著者
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DAIMON Hiroshi
Nara Institute of Science and Technology (NAIST)
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MATSUSHITA Tomohiro
Japan Synchrotron Radiation Research Institute
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Matsushita Tomohiro
Jasri Spring-8
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Guo Fang
Japan Synchrotron Radiation Research Institute
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Guo Fang
Japan Synchrotron Radiation Research Institute (jasri)
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Daimon Hiroshi
Graduate School Of Materials Science Nara Institute Of Science And Technology(naist)
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MATSUI Fumihiko
Materials Science, Nara Institute of Science and Technology (NAIST)
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KATO Yukako
CREST-JST
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DAIMON Hiroshi
Materials Science, Nara Institute of Science and Technology (NAIST)
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Kato Yukako
Nara Institute Of Science And Technology (naist):jasri Spring-8
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