Quantitative determination of hybridization effect in rare-earth compounds by synchrotron radiation angle-resolved photoemission spectroscopy

• Project/Area Number: 26800191
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Osaka Prefecture University
• Principal Investigator: Hiroaki Anzai 大阪府立大学, 工学(系)研究科(研究院), 助教 (90609736)
• Research Collaborator: SUZUNA Ishihara 大阪府立大学, 大学院工学研究科
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 重い電子系 / 角度分解光電子分光 / 希土類化合物 / 相転移 / 電子状態

Outline of Final Research Achievements

We performed angle-resolved photoemission spectroscopy measurements with synchrotron radiation on EuPtP, EuNi2P2, and YbInCu4. From the electronic structure near the Fermi level, we revealed that the presence of an energy gap at the crossing point of the localized 4f and conduction bands. The shape of bands is described by a hybridization-band picture based on the periodic Anderson model. Our results indicate that the c-f hybridization effect in the rare-earth compounds is relevant to the valence transition and heavy-fermion state.

Research Products

• [Journal Article] Observation of the c-f hybridization effect in valence-transition system EuPtP (2017)
  • Author(s): H. Anzai, K. Ichiki, Eike F. Schwier, H. Iwasawa, M. Arita, H. Sato, K. Shimada, H. Namatame, M. Taniguchi, A. Mitsuda, H. Wada, and K. Mimura
  • Journal Title: Physica Status Solidi C Volume: - Issue: 6
  • DOI: 10.1002/pssc.201600185
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Temperature-Dependent Electronic Structure of EuNi2P2 Revealed by Angle-Resolved Photoemission Spectroscopy (2017)
  • Author(s): H. Anzai, K. Ichiki, E. K. Schwier, H. Iwasawa, K. Shimada, H. Namatame, M. Taniguchi, A. Mitsuda, H. Wada, and K. Mimura
  • Journal Title: Journal of Physics: Conference Series Volume: 807 Pages: 012006-012011
  • DOI: 10.1088/1742-6596/807/1/012006
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] The c-f Hybridization effect in the subsurface region of YbInCu4 (2016)
  • Author(s): S. Ishihara, K. Ichiki, K. Abe, T. Matsumoto, K. Mimura, H. Sato, M. Arita, E. F. Schwier, H. Iwasawa, K. Shimada, H. Namatame, M. Taniguchi, T. Zhuang, K. Hiraoka, and H. Anzai
  • Journal Title: Journal of Electron Spectroscopy and Related Phenomena Volume: - Pages: 66-68
  • DOI: 10.1016/j.elspec.2016.12.009
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Temperature Dependence of Fermi Surface in Mixed-Valent EuPtP (2015)
  • Author(s): H. Anzai, K. Ichiki, M. Arita, H. Namatame, M. Taniguchi, M. Mitsuda, M. Umeda, S. Manabe, H. Wada, H. Ikeda, and K. Mimura
  • Journal Title: Proceedings of the 19th Hiroshima International Symposium on Synchrotron Radiation Volume: 1 Pages: 129-130
• [Presentation] 希土類化合物 YbInCu4 の subsurface 領域における混成効果の定量評価 (2017)
  • Author(s): 石原涼奈, 市木勝也, 阿部晃大, 松本孝之, 三村功次郎, 佐藤仁, 有田将司, 岩澤英明, E. F. Schwier, 島田賢也, 生天目博文,谷口雅樹, T. Zhuang, 平岡耕一, 安齋太陽
  • Organizer: 第 30 回日本放射光学会年会・放射光科学合同シンポジウム
  • Place of Presentation: 神戸芸術センター
  • Year and Date: 2017-01-08
• [Presentation] はみだし元素 希土類系 ～伝導電子と 4f 電子の深い絆～ (2016)
  • Author(s): 安齋太陽
  • Organizer: 第 4 回大阪府立大学 TT-net ワークショップ
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2016-10-26
  • Invited
• [Presentation] 角度分解光電子分光法を用いた YbInCu4 の sub-surface 領域における混成効果 (2016)
  • Author(s): 石原涼奈, 市木勝也, 阿部晃大, 松本孝之, 三村功次郎, 佐藤仁, 有田将司, 岩澤英明, E. F. Schwier, 島田賢也, 生天目博文,谷口雅樹, T. Zhuang, 平岡耕一, 安齋太陽
  • Organizer: 日本物理学会 2016 年 秋季大会
  • Place of Presentation: 金沢大学角間キャンパス
  • Year and Date: 2016-09-15
• [Presentation] Hybridization phenomena in valence-transition system EuPtP revealed by angle-resolved photoemission spectroscopy (2016)
  • Author(s): Hiroaki Anzai, Katsuya Ichiki, Eike F. Schwier, Hideaki Iwasawa, Masashi Arita, Hitoshi Sato, Kenya Shimada, Hirofumi Namatame, Masaki Taniguchi, Akihiro Mitsuda, Hirofumi Wada, and Kojiro Mimura
  • Organizer: 20th International Conference on Ternary and Multinary Compounds
  • Place of Presentation: Halle, Germany
  • Year and Date: 2016-09-07
  • Int'l Joint Research
• [Presentation] Hybridization effect in sub-surface region of YbInCu4 (2016)
  • Author(s): S. Ishihara, K. Ichiki, K. Abe, T. Matsumoto, K. Mimura, H. Sato, M. Arita, E. F. Schwier, H. Iwasawa, K. Shimada, H. Namatame, M. Taniguchi, T. Zhuang, K. Hiraoka, H. Anzai
  • Organizer: 39th International Conference on Vacuum Ultraviolet and X-ray Physics (VUVX2016)
  • Place of Presentation: Zurich, Switzerland
  • Year and Date: 2016-07-05
  • Int'l Joint Research
• [Presentation] Temperature-Dependent Electronic Structure of EuNi2P2 Revealed by Angle-Resolved Photoemission Spectroscopy (2016)
  • Author(s): H. Anzai, K. Ichiki, E. F. Schwier, H. Iwasawa, K. Shimada, H. Namatame, M. Taniguchi, A. Mitsuda, H. Wada, and K. Mimura
  • Organizer: International Conference on Strongly Correlated Electron Systems 2016
  • Place of Presentation: Hangzhou, China
  • Year and Date: 2016-05-10
  • Int'l Joint Research
• [Presentation] 重い電子状態を示す EuNi2P2 における偏光依存角度分解光電子分光 (2016)
  • Author(s): 安齋太陽, 市木勝也, Eike F. Schwier, 岩澤英明, 島田賢也, 生天目博文, 谷口雅樹, 光田暁弘, 和田裕文, 三村功次郎
  • Organizer: 第 29 回 日本放射光学会・放射光科学合同シンポジウム
  • Place of Presentation: 東京大学 柏の葉キャンパス（千葉県 柏市）
  • Year and Date: 2016-01-10
• [Presentation] Temperature Dependence of Fermi Surface in Mixed-Valent EuPtP (2015)
  • Author(s): H. Anzai, K. Ichiki, M. Arita, H. Namatame, M. Taniguchi, M. Mitsuda, M. Umeda, S. Manabe, H. Wada, H. Ikeda, and K. Mimura
  • Organizer: The 19th Hiroshima International Symposium on Synchrotron Radiation
  • Place of Presentation: 広島大学
  • Year and Date: 2015-03-05
• [Presentation] 二段の価数転移を示す EuPtP の角度分解光電子分光 (2015)
  • Author(s): 安齋太陽, 市木勝也, 有田将司, 生天目博文, 谷口雅樹, 光田暁弘, 梅田真史, 眞鍋栄樹, 和田裕文, 池田浩章, 三村功次郎
  • Organizer: 第 28 回 日本放射光学会年会・放射光科学合同シンポジウム
  • Place of Presentation: 立命館大学
  • Year and Date: 2015-01-12