強相関希土類薄膜のフェルミ面および準粒子バンドの定量評価

2014 Fiscal Year Research-status Report

• Project/Area Number: 25400376
• Research Institution: Hiroshima University
• Principal Investigator: 島田 賢也 広島大学, 放射光科学研究センター, 教授 (10284225)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 強相関電子系 / 金属物性 / エピタキシャル成長 / 表面・界面物性 / 物性実験

Outline of Annual Research Achievements

[具体的内容] (1) タングステン単結晶基板を清浄化するための新型高温アニール装置を製作した。(2) 新型高温アニール装置を稼働させ、タングステン単結晶基板の清浄化を行い、低速電子線回折像およびオージェ電子スペクトルで清浄性を確認した。(3) タングステン基板上に真空蒸着法を用いてセリウム単結晶薄膜を作製した。膜厚はオージェ電子スペクトルを用いて評価し、4-5原子層と見積もった。明瞭な１×１の低速電子線回折スポットを確認し、６回対称性を持つ表面が得られた。(4) 直線偏光依存高分解能角度分解光電子分光実験（ARPES）を行い、セリウム単結晶薄膜の電子バンド分散を軌道の対称性に応じて選択的に分離観測した。(5) フェルミ面に6回対称性性があること、バンド構造の励起光エネルギー依存性が弱いことから、dhcp構造を持つと結論した。
[意義、重要性] 希土類金属単体は空気中で反応性に富むため、バルク単結晶試料を用いたARPESによる電子構造解析は困難である。このため超高真空中で単結晶薄膜を作製し、清浄性や結晶構造を評価して実験を行う必要がある。しかし希土類金属元素のランタン、セリウムについて、ARPESでバンド構造、フェルミ面を精密計測した例はほとんどない。本年度は新型高温アニール装置を新たに製作、稼働させ、dhcp構造をもつセリウムについて詳細な電子構造解析を行った。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

新型高温アニール装置を製作、稼働状況に持ち込み、タングステン基板の清浄化が安定して出来るようになった。これを用いてセリウム薄膜単結晶を作製し、その電子状態を直線偏光依存角度分解光電子分光により観測することができた。

Strategy for Future Research Activity

最終年度である平成２７年度は、本研究課題で得られた研究成果をとりまとめ、学会発表および論文発表を行う。

Research Products

• [Journal Article] Structural and electronic properties of manganese-doped Bi2Te3 epitaxial layers (2015)
  • Author(s): J. Ruzicka, O. Caha, V. Holy, H. Steiner, V. Volobuiev, A. Ney, G. Bauer, T. Duchon, K. Veltruska, I. Khalakhan, V. Matolin, E. F. Schwier, H. Iwasawa, K. Shimada, G. Springholz
  • Journal Title: New Journal of Physics Volume: 17 Pages: 013028(11p)
  • DOI: 10.1088/1367-2630/17/1/013028
  • Peer Reviewed
• [Journal Article] Electronic Structure Reconstruction across Antiferromagnetic Transition in TaFe1.23Te3 Spin Ladder (2015)
  • Author(s): M. Xu, Li-Min Wang, R. Peng, Q. Q. Ge, F. Chen, Z. R. Ye, Y. Zhang, S. D. Chen, M. Xia, R. H. Liu, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, M. Matsunami, S. Kimura, M. Shi, X. H. Chen, Wei-Guo Yin, Wei Ku, B. P. Xie, and D. L. Feng
  • Journal Title: Chinese Physics Letters Volume: 32 Pages: 027401(4p)
  • DOI: 10.1088/0256-307X/32/2/027401
  • Peer Reviewed
• [Journal Article] The Rashba-split surface state of Sb2Te3(0001) and its interaction with bulk states (2015)
  • Author(s): Christoph Seibel, Henriette Maass, Hendrik Bentmann, Juergen Braun, Jan Minar, Kazuyuki Sakamoto, Masashi Arita, Kenya Shimada, Hubert Ebert, and Friedrich Reinert
  • Journal Title: Physical Review Letters Volume: 114 Pages: 066802(5p)
  • DOI: 10.1103/PhysRevLett.114.066802
  • Peer Reviewed
• [Journal Article] Photoemission study on YbZn1-xSnxCu4 (2015)
  • Author(s): Hitoshi Sato, Yuki Utsumi, Junichi Kodama, Masashi Arita, Hiroaki Anzai, Kojiro Mimura, Kenya Shimada, Shigenori Ueda, Naohito Tsujii, Hirofumi Namatame and Masaki Taniguchi
  • Journal Title: Joural of Physics: Conference Series Volume: 592 Pages: 012016(5p)
  • DOI: 10.1088/1742-6596/592/1/012016
  • Peer Reviewed
• [Journal Article] Electronic structure of heavy fermion caged-compound Ce3Pd20X6 (X = Si, Ge) studied by photoelectron spectroscopy (2015)
  • Author(s): Hitoshi Yamaoka, Eike F. Schwier, Masashi Arita, Kenya Shimada, Naohito Tsujii, Ignace Jarrige, Jian Jiang, Hirokazu Hayashi, Hideaki Iwasawa, Hirofumi Namatame, Masaki Taniguchi, and Hideaki Kitazawa
  • Journal Title: Physical Review B Volume: 91 Pages: 115139(9p)
  • DOI: 10.1103/PhysRevB.91.115139
  • Peer Reviewed
• [Journal Article] Electronic structure of the BaTi2As2O parent compound of the titanium based oxypnictide superconductor (2014)
  • Author(s): H. C. Xu, M. Xu, R. Peng, Y. Zhang, Q. Q. Ge, F. Qin, M. Xia, J. J. Ying, X. H. Chen, M. Arita, K. Shimada, M. Taniguchi, D. H. Lu, B. P. Xie, and D. L. Feng
  • Journal Title: Physical Review B Volume: 89 Pages: 155108(8p)
  • DOI: 10.1103/PhysRevB.89.155108
  • Peer Reviewed
• [Journal Article] Evidence of coexisting Kondo screening and valence fluctuations in the CePd7/Pd(001) surface alloy (2014)
  • Author(s): M. Mulazzi, K. Shimada, J. Jiang, H. Iwasawa, F. Reinert
  • Journal Title: Physical Review B Volume: 89 Pages: 205134(6p)
  • DOI: 10.1103/PhysRevB.89.205134
  • Peer Reviewed
• [Journal Article] Polarization-Dependent ARPES Study on Quasi-One-Dimensional BaVS3 (2014)
  • Author(s): Hitoshi Sato, Komei Tobimatsu, Arata Tanaka, Hiroyuki Nakamura, Hirokazu Hayashi, Hideaki Iwasawa, Kenya Shimada, Hirofumi Namatame and Masaki Taniguchi
  • Journal Title: JPS Conference Proceedings Volume: 3 Pages: 013015(4p)
  • DOI: 10.7566/JPSCP.3.013015
  • Peer Reviewed
• [Journal Article] Evidence of Topological Surface State in Three-Dimensional Dirac Semimetal Cd3As2 (2014)
  • Author(s): Hemian Yi, Zhijun Wang, Chaoyu Chen, Youguo Shi, Ya Feng, Aiji Liang, Zhuojin Xie, Shaolong He, Junfeng He, Yingying Peng, Xu Liu, Yan Liu, Lin Zhao, Guodong Liu, Xiaoli Dong, Jun Zhang, M. Nakatake, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, Zuyan Xu, Chuangtian Chen, Xi Dai, Zhong Fang, X. J. Zhou
  • Journal Title: Scientific Reports Volume: 4 Pages: 6106(6p)
  • DOI: 10.1038/srep06106
  • Peer Reviewed / Open Access
• [Journal Article] Symmetry Resolved Surface-Derived Electronic Structure of MoS2(0001) (2014)
  • Author(s): Takashi Komesu, Duy Le, Quan Ma, Eike F. Schwier, Yohei Kojima, Mingtian Zheng, Hideaki Iwasawa, Kenya Shimada, Masaki Taniguchi, Ludwig Bartels, Talat Rahman and P. A. Dowben
  • Journal Title: Journal of Physics: Condensed Matter Volume: 26 Pages: 455501(8p)
  • DOI: 10.1088/0953-8984/26/45/455501
  • Peer Reviewed
• [Journal Article] Occupied and Unoccupied Electronic Structure of Na doped MoS2(0001) (2014)
  • Author(s): Takashi Komesu, Duy Le, Xin Zhang, Quan Ma, Eike F. Schwier, Yohei Kojima, Mingtian Zheng, Hideaki Iwasawa, Kenya Shimada, Masaki Taniguchi, Ludwig Bartels, Talat Rahman and P. A. Dowben
  • Journal Title: Applied Physics Letters Volume: 105 Pages: 241602(4p)
  • DOI: 10.1063/1.4903824
  • Peer Reviewed
• [Presentation] Recent progress of high-resolution ARPES at HiSOR (2015)
  • Author(s): Kenya Shimada
  • Organizer: Seminar
  • Place of Presentation: Tsinghya University, China
  • Year and Date: 2015-03-30 – 2015-03-30
  • Invited
• [Presentation] Recent progress of high-resolution ARPES at HiSOR (2015)
  • Author(s): Kenya Shimada
  • Organizer: Seminar
  • Place of Presentation: Institute of Physics, Chinese Academy of Science, China
  • Year and Date: 2015-03-30 – 2015-03-30
  • Invited
• [Presentation] Ce単結晶薄膜の高分解能角度分解光電子分光III (2015)
  • Author(s): 小島耀平，永田偉士，E. F. Schwier，岩澤英明，堀家大希，M. Zheng，相浦義弘，島田賢也，生天目博文，谷口雅樹
  • Organizer: 日本物理学会 第70回年次大会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] Spin- and angle-resolved photoemission study of oxygen adsorbed Fe/MgO(100) (2015)
  • Author(s): Mingtian Zheng，Eike F. Schwier，Kenya Shimada，Taichi Okuda，Hideaki Iwasawa，Koji Miyamoto，Taiki Horike，Yorito Nagata，Yohei Kojima，Hirofumi Namatame，and Masaki Taniguchi
  • Organizer: 日本物理学会 第70回年次大会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] Recent progress of high-resolution ARPES at HiSOR (2014)
  • Author(s): Kenya Shimada
  • Organizer: Pohang Accelerator Laboratory user’s meeting
  • Place of Presentation: Pohang, Korea
  • Year and Date: 2014-11-20 – 2014-11-20
  • Invited
• [Presentation] 光電子分光法の最近の進歩と利用研究 (2014)
  • Author(s): 島田賢也
  • Organizer: 日本分析化学会第63年会
  • Place of Presentation: 広島大学
  • Year and Date: 2014-09-17 – 2014-09-19
  • Invited
• [Presentation] Ce単結晶薄膜の高分解能角度分解光電子分光II (2014)
  • Author(s): 小島耀平，永田偉士，E. F. Schwier，岩澤英明，堀家大希，M. Zheng，相浦義弘，島田賢也，生天目博文，谷口雅樹
  • Organizer: 日本物理学会 2014年秋季大会
  • Place of Presentation: 中部大学
  • Year and Date: 2014-09-07 – 2014-09-10
• [Presentation] 光電子分光による重い電子系かご状化合物Ce3Pd20X6 (X = Si, Ge)の電子構造の測定 (2014)
  • Author(s): 山岡人志，Eike F. Schwier，有田将司，辻井直人，Ignace Jarrige，姜健，林博和，岩沢英明，島田賢也，生天目博文，谷口雅樹，北澤英明
  • Organizer: 日本物理学会 2014年秋季大会
  • Place of Presentation: 中部大学
  • Year and Date: 2014-09-07 – 2014-09-10
• [Presentation] High-resolution angle-resolved photoemission study of oxygen adsorbed Fe/MgO(100) (2014)
  • Author(s): Mingtian Zheng，Eike F. Schwier，Koji Miyamoto，Taichi Okuda，Kenya Shimada，Hideaki Iwasawa，Taiki Horike，Yorito Nagata，Yohei Kojima，Hirofumi Namatame，and Masaki Taniguchi
  • Organizer: 日本物理学会 2014年秋季大会
  • Place of Presentation: 中部大学
  • Year and Date: 2014-09-07 – 2014-09-10
• [Presentation] Photoemission study on YbZn1-xSnxCu4 (2014)
  • Author(s): Hitoshi Sato, Yuki Utsumi, Junichi Kodama, Masashi Arita, Hiroaki Anzai, Kojiro Mimura, Kenya Shimada, Shigenori Ueda, Naohito Tsujii, Hirofumi Namatame, Masaki Taniguchi
  • Organizer: The International Conference on Strongly Correlated Electron Systems (SCES 2014)
  • Place of Presentation: Grenoble, France
  • Year and Date: 2014-07-07 – 2014-07-11
• [Presentation] Hard X-ray photoemission study of the temperature-induced valence transition system EuNi2(Si1-xGex)2 (2014)
  • Author(s): Katsuya Ichiki, Kojiro Mimura, Hiroaki Anzai, Takayuki Uozumi, Eiichiro Matsuyama, Hitoshi Sato, Yuki Utsumi, Shigenori Ueda, Akihiro Mitsuda, HirofumiWada, Yukihiro Taguchi, Kenya Shimada, Hirofumi Namatame, Masaki Taniguchi
  • Organizer: The International Conference on Strongly Correlated Electron Systems (SCES 2014)
  • Place of Presentation: Grenoble, France
  • Year and Date: 2014-07-07 – 2014-07-11
• [Presentation] High-resolution ARPES study of Ce thin lm (2014)
  • Author(s): Yohei Kojima, Yorito Nagata, Kenya Shimada, Eike F. Schwier, Hideaki Iwasawa, Taiki Horike, Mingtian Zheng, Yoshihiro Aiura, Hirofumi Namatame, Masaki Taniguchi
  • Organizer: The International Conference on Strongly Correlated Electron Systems (SCES 2014)
  • Place of Presentation: Grenoble, France
  • Year and Date: 2014-07-07 – 2014-07-11
• [Presentation] Fermi surface and band structure of La thin lm: high-resolution ARPES study (2014)
  • Author(s): Kenya Shimada, Yorito Nagata, Eike F. Schwier, Yohei Kojima, Hideaki Iwasawa, Taiki Horike, Mingtian Zheng, Yoshihiro Aiura, Hirofumi Namatame, Masaki Taniguchi
  • Organizer: The International Conference on Strongly Correlated Electron Systems (SCES 2014)
  • Place of Presentation: Grenoble, France
  • Year and Date: 2014-07-07 – 2014-07-11
• [Presentation] Bulk electronic structure in EuNi2X2 (X = Si, P, Ge) investigated by hard X-ray photoemission spectroscopy (2014)
  • Author(s): Kojiro Mimura, Katsuya Ichiki, Hiroaki Anzai, Takayuki Uozumi, Eiichiro Matsuyama, Hitoshi Sato, Yuki Utsumi, Shigenori Ueda, Akihiro Mitsuda, HirofumiWada, Yukihiro Taguchi, Kenya Shimada, Hirofumi Namatame, Masaki Taniguchi
  • Organizer: The International Conference on Strongly Correlated Electron Systems (SCES 2014)
  • Place of Presentation: Grenoble, France
  • Year and Date: 2014-07-07 – 2014-07-11
• [Remarks] 広島大学研究者総覧
  • URL: http://seeds.hiroshima-u.ac.jp/soran/e2bah6a/index.html
• [Remarks] Research Gate
  • URL: https://www.researchgate.net/profile/Kenya_Shimada/?ev=prf_highl