Elucidation of fine electronic structures in strongly correlated multiband materials by means of polarization-dependent ARPES

2012 Fiscal Year Final Research Report

• Project/Area Number: 22740233
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Hiroshima University
• Principal Investigator: IWASAWA Hideaki 広島大学, 放射光科学研究センター, 助教 (90514068)
• Project Period (FY): 2010 – 2012
• Keywords: 強相関系 / 角度分解光電子分光(ARPES)

Research Abstract

By means of high-resolution angle-resolved photoemission spectroscopy (ARPES) utilizing the tunable photon-energy and the linear polarization properties of synchrotron radiation, we clarified fine electronic structures of a representative strongly correlated multiband material, Sr_2RuO_4. The multi-electronic states of Sr_2RuO_4can be disentangled, allowing us to analyze the self-energy indetail. We revealed how electron-phonon interaction, spin-orbit interaction, and electron correlation are corporately involved in renormalization effectsi n Sr_2RuO_4. We also established a new evaluation method which gives each coupling strength of above many-body interactions quantitatively.

Research Products

• [Journal Article] True' bosonic coupling strength in strongly correlated superconductors (2013)
  • Author(s): H. Iwasawa, Y. Yoshida, I. Hase, K. Shimada, H. Namatame, M. Taniguchi, Y. Aiura
  • Journal Title: Sci. Rep Volume: 3 Pages: 1930
  • Peer Reviewed
• [Journal Article] Prepairing and the "filling" gap in the cuprates from the tomographic density of states (2013)
  • Author(s): T. J. Reber, N. C. Plumb, Y. Cao, Z. Sun, Q. Wang, K. McElroy, H. Iwasawa, M. Arita, J. S. Wen, Z. J. Xu, G. Gu, Y. Yoshida, H. Eisaki, Y. Aiura, D. S. Dessau
  • Journal Title: Phys. Rev. B Volume: 87 Pages: 060506(R)
  • Peer Reviewed
• [Journal Article] High-resolution angle-resolved photoemission study of electronic structure a nd electron self-energy in palladium (2013)
  • Author(s): H. Hayashi, K. Shimada, J. Jiang, H. Iwasawa, Y. Aiura, T. Oguchi, H. Namatame, M. Taniguchi
  • Journal Title: Phys. Rev. B Volume: 87 Pages: 035140
  • Peer Reviewed
• [Journal Article] Fermi-surface reconstruction involving two van Hove singularities across the antiferromagnetic transition in BaFe_2As_2 (2013)
  • Author(s): Y. Nakashima, A. Ino, S. Nagato, H. Anzai, H. Iwasawa, Y. Utsumi, H. Sato, M. Arita, H. Namatame, M. Taniguchi, T. Oguchi, Y. Aiura, I. Hase, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki
  • Journal Title: Solid State Commun Volume: 157 Pages: 16
  • Peer Reviewed
• [Journal Article] High-Energy Anomaly in the Band Dispersion of the Ruthenate Superconductor (2012)
  • Author(s): H. Iwasawa, Y. Yoshida, I. Hase, K. Shimada, H. Namatame, M. Taniguchi, Y. Aiura
  • Journal Title: Phys. Rev. Lett Volume: 109 Pages: 066404
  • Peer Reviewed
• [Journal Article] The origin and non-quasiparticle nature of Fermi acs in Bi_2Sr_2CaCu_2O_8+ δ (2012)
  • Author(s): T. J. Reber, N. C. Plumb, Z. Sun, Y. Cao, Q. Wang, K. McElroy, H. Iwasawa, M. Arita, J. S. Wen, Z. J. Xu, G. Gu, Y. Yoshida, H. Eisaki, Y. Aiura, D. S. Dessau
  • Journal Title: Nature Phys Volume: 8 Pages: 606
  • Peer Reviewed
• [Journal Article] K. Fukutani, H. Hayashi, I. N. Yakovkin, T. Habuchi, D. Hirayama, J. Jiang, H. Iwasawa, K. Shimada, Y. B. Losovyj, P. A. Dowben (2012)
  • Author(s): K. Fukutani, H. Hayashi, I. N. Yakovkin, T. Habuchi, D. Hirayama, J. Jiang, H. Iwasawa, K. Shimada, Y. B. Losovyj, P. A. Dowben
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 205432
  • Peer Reviewed
• [Journal Article] Massless or heavy due to two-fold symmetry: Surface-state electrons at W(110) (2012)
  • Author(s): K. Miyamoto, A. Kimura, T. Okuda, K. Shimada, H. Iwasawa, H. Hayashi, H. Namatame, M. Taniguchi, M. Donath
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 161411(R)
  • Peer Reviewed
• [Journal Article] New view of the occupied band structure of Mo(112) (2012)
  • Author(s): K. Fukutani, H. Hayashi, I. N. Yakovkin, T. R. Paudel, T. Habuchi, D. Hirayama, J. Jiang, H. Iwasawa, K. Shimada, N. Wu, E. Y. Tsymbal, Y. B. Losovyj, P. A. Dowben
  • Journal Title: New view of the occupied band structure of Mo(112) Volume: 85 Pages: 155435
  • Peer Reviewed
• [Journal Article] Fermi surface of Mo(112) and indirect interaction between adsorbed atoms (2012)
  • Author(s): I. N. Yakovkin, K. Fukutani, H. Hayashi, J. Jiang, T. Horike, Y. Nagata, T. Habuchi, D. Hirayama, H. Iwasawa, K. Shimada, Y. B. Losovyj, P. A. Dowben
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 125401
  • Peer Reviewed
• [Journal Article] Character of valence-band states in the Kondo surface alloys CeAg_x/Ag(111) and CePt_5/Pt(111) (2012)
  • Author(s): H. Schwab, M. Mulazzi, J. Jiang, H. Hayashi, T. Habuchi, D. Hirayama, H. Iwasawa, K. Shimada, F. Reinert
  • Journal Title: Phys. Rev. B Volume: 85 Pages: 125130
  • Peer Reviewed
• [Journal Article] Electronic structure and the valence state of Yb2Pd2Sn and YbPd_2Sn studied by photoelectron and resonant x-ray emission spectroscopies (2012)
  • Author(s): H. Yamaoka, P. Thunstrom, N. Tsujii, I. Jarrige, K. Shimada, M. Arita, H. Iwasawa, H. Hayashi, J. Jiang, H. Namatame, M. Taniguchi, N. Hiraoka, H. Ishii, K.-D. Tsuei, M. Giovannini, E. Bauer
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 085137
  • Peer Reviewed
• [Journal Article] High-resolution photoelectron spectroscopy st udy of Kondo metals: SmSn_3 and Sm_0.9La_0.1Sn_3 (2012)
  • Author(s): H. Yamaoka, P. Thunstrom, I. Jarrige, K. Shimada, N. Tsujii, M. Arita, H. Iwasawa, H. Hayashi, J. Jiang, T. Habuchi, D. Hirayama, H. Namatame, M. Taniguchi, U. Murao, S. Hosoya, A. Tamaki, H. Kitazawa
  • Journal Title: Phys. Rev. B Volume: 85 Pages: 115120
  • Peer Reviewed
• [Journal Article] Coupling parameters of many-body interactions for the Al(100) surface state: A high-resolution angle-resolved photoemission spectroscopy stu dy (2011)
  • Author(s): J. Jiang, K. Shimada, H. Hayashi, H. Iwasawa, Y. Aiura, H. Namatame, M. Taniguchi
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 155124
  • Peer Reviewed
• [Journal Article] Orbital characters of bands in the iron-based superconductor BaFe_1.85Co_0.15As_2 (2011)
  • Author(s): Y. Zhang, F. Chen, C. He, B. Zhou, B. Xie, C. Fang, W. Tsai, X. Chen, H. Hayashi, J. Jiang, H. Iwasawa, K. Shimada, H. Namatame, M. Taniguchi, J. Hu, D. Feng
  • Journal Title: Phys. Rev. B Volume: 83 Pages: 054510
  • Peer Reviewed
• [Journal Article] Spin-doping effect on the electronic structure of Sr_1-(x+y)La_x+yTi_1-xCr_xO_3 (2011)
  • Author(s): T. Saitoh, H. Iwasawa, K. Kurahashi, Y. Nakano, T. Katsufuji, I. Hase, K. Shimada, H. Namatame, M. Taniguchi
  • Journal Title: J. Electron Spectrosc. Relat. Phenom Volume: 184 Pages: 232
  • Peer Reviewed
• [Journal Article] Interplay among Coulomb Interaction, Spin-Orbit Interaction, and Multiple Electron-Boson Interactions in Sr_2RuO_4 (2010)
  • Author(s): H. Iwasawa, Y. Yoshida, I. Hase, S. Koikegami, H. Hayashi, J. Jiang, K. Shimada, H. Namatame, M. Taniguchi, Y. Aiura
  • Journal Title: Phys. Rev. Lett Volume: 105 Pages: 226406
  • Peer Reviewed
• [Journal Article] Oxygen isotope effect in optimally doped Bi_2Sr_2CaCu_2O_8+δstudied by low-energy ARPES (2010)
  • Author(s): H. Iwasawa, J. F. Douglas, K. Sato, T. Masui, Y. Yoshida, Z. Sun, H. Eisaki, H. Bando, A. Ino, M. Arita, K. Shimada, H. Namatame, M. Taniguchi, S. Tajima, S. Uchida, T. Saitoh, D. S. Dessau, Y. Aiura
  • Journal Title: Physica C Volume: 470 Pages: S134
  • Peer Reviewed
• [Journal Article] Enhancement of Hybridization between Two- and One-Dimensional Bands due to Coulomb and Spin-Orbit Interactions in Sr_2RuO_4 (2010)
  • Author(s): Y. Aiura, I. Hase, Y. Yoshida, S. Koikegami, H. Iwasawa
  • Journal Title: J. Phys. Soc. Jpn Volume: 79 Pages: 123702
  • Peer Reviewed
• [Journal Article] Hexagonally Deformed Fermi Surface of the 3D Topological Insulator Bi_2Se_3 (2010)
  • Author(s): K. Kuroda, M. Arita, K. Miyamoto, M. Ye, J. Jiang, A. Kimura, E. Krasovskii, E. Chulkov, H. Iwasawa, T. Okuda, K. Shimada, Y. Ueda, H. Namatame, M. Taniguchi
  • Journal Title: Phys. Rev. Lett Volume: 105 Pages: 076802
  • Peer Reviewed
• [Journal Article] Electronic structure of K_0.5CoO_2studied by angle-resolved photoemission spectroscopy (2010)
  • Author(s): H. Usui, H. Iwasawa, M. Hirose, Y. Maeda, T. Saitoh, H. Osada, T. Kyomen, M. Hanaya, Y. Aiura, Y. Kotani, M. Kubota, K. Ono
  • Journal Title: Physica C Volume: 470 Pages: S758
  • Peer Reviewed
• [Presentation] 角度分解光電子分光を用いた自己エネルギー導出方法の改善 (2013)
  • Author(s): 岩澤英明
  • Organizer: 日本物理学会(第68回年次大会)
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-29
• [Presentation] Sr_2RuO_4における電子相関による電子バンドの繰り込み (2013)
  • Author(s): 岩澤英明
  • Organizer: 第26回日本放射光学会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2013-01-14
• [Presentation] Two Distinct Types of Band Renormalization: High-energy Anomaly vs. Band Narrowing (2012)
  • Author(s): H. Iwasawa
  • Organizer: The 12th International Conference on Electronic Spectroscopy and Structure (ICESS11)
  • Place of Presentation: Saint-Malo, France
  • Year and Date: 2012-09-17
• [Presentation] Electron correlation effects in Sr_2RuO_4re vea le d b y angle-resolved photoemission spectroscopy, Qu ant um in C omplex Matter: Superconductivity, Magnetism and Ferroelectricity (2012)
  • Author(s): H. Iwasawa
  • Organizer: Superstripes13
  • Place of Presentation: Ischia, Italy
  • Year and Date: 2012-05-28
• [Presentation] VUV 領域の高分解能角度分解光電子分光の偏光依存性 (2012)
  • Author(s): 岩澤英明
  • Organizer: 日本物理学会(第67回年次大会)
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-25
• [Presentation] Angle-resolved Photoemission Study on the High-energy Anomaly in the Energy Dispersion of Layered Transition-Metal Oxides (2012)
  • Author(s): H.Iwasawa
  • Organizer: The 16th Hiroshima International Symposium on Synchrotron Radiation
  • Place of Presentation: Hiroshima, Japan
  • Year and Date: 2012-03-01
• [Presentation] ルテニウム・銅酸化物超伝導体における高エネルギー領域のバンド分散の異常 (2012)
  • Author(s): 岩澤英明
  • Organizer: 第25回日本放射光学会
  • Place of Presentation: 鳥栖市民文化会館
  • Year and Date: 2012-01-08
• [Presentation] 真空紫外線域の放射光を用いた酸化物超伝導体の微細電子構造の研究 (2012)
  • Author(s): 岩澤英明
  • Organizer: 第25回日本放射光学会
  • Place of Presentation: 鳥栖市民文化会館
  • Year and Date: 2012-01-07
• [Presentation] 銅酸化物及びルテニウム酸化物超伝導体における電子バンドの繰り込み (2011)
  • Author(s): 岩澤英明
  • Organizer: 日本物理学会(秋季大会)
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-24
• [Presentation] Band renormalization in cuprate and ruthenate superconductors (2011)
  • Author(s): H. Iwasawa
  • Organizer: International Workshop on Strong Correlations and Angle-Resolved Photoemission Spectroscopy (CORPES11)
  • Place of Presentation: Berkeley, California
  • Year and Date: 2011-07-21
• [Presentation] Electron-boson coupling in cuprate and ruthenate superconductors fingerprinted by high-resolution ARPES (2011)
  • Author(s): H. Iwasawa
  • Organizer: The 15th Hiroshima International Symposium on Synchrotron Radiation
  • Place of Presentation: Hiroshima, Japan
  • Year and Date: 2011-03-04
• [Presentation] Sr_2RuO_4の高分解能角度光電子分光:偏光・励起光依存性 (2011)
  • Author(s): 岩澤英明
  • Organizer: 第24回日本放射光学会
  • Place of Presentation: つくば国際会議場
  • Year and Date: 2011-01-09
• [Presentation] Electron-phonon coupling in cuprate and ruthenate superconductors (2010)
  • Author(s): H. Iwasawa
  • Organizer: A3 Foresight Program of "Joint Research on Novel Properties of Complex Oxides"
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2010-11-10
• [Presentation] Sr_2RuO_4の電子状態における偏光・励起光依存性 (2010)
  • Author(s): 岩澤英明
  • Organizer: 日本物理学会(秋季大会)
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-25
• [Presentation] Polarization and k_z-dependent ARPES study of Sr2RuO4 (2010)
  • Author(s): H. Iwasawa
  • Organizer: The 37th International conference on Vacuum Ultraviolet and X-ray Physics (VUVX2010)
  • Place of Presentation: Vancouver, Canada
  • Year and Date: 2010-07-13
• [Presentation] Polarization-dependent ARPES study of Sr_2RuO_4: Disentanglement of multiband system (2010)
  • Author(s): H. Iwasawa
  • Organizer: The 14th Hiroshima International Symposium on Synchrotron Radiation
  • Place of Presentation: Hiroshima, Japan
  • Year and Date: 2010-03-03
• [Presentation] 偏光依存角度分解光電子分光を用いた Sr_2RuO_4の軌道選択的電子構造の研究 (2010)
  • Author(s): 岩澤英明
  • Organizer: 第23回日本放射光学会
  • Place of Presentation: イーグレ姫路
  • Year and Date: 2010-01-09
• [Book] 放射光 (2013)
  • Author(s): 岩澤英明,相浦義弘
  • Total Pages: 121-125
  • Publisher: 日本放射光学会
• [Book] 高温超伝導現象と用途開発最前線(3 章 2 節 1 項) (2013)
  • Author(s): 岩澤英明,相浦義弘
  • Total Pages: 449-459
  • Publisher: NTS
• [Book] 放射光 (2013)
  • Author(s): 岩澤英明
  • Total Pages: 121-125
  • Publisher: 日本放射光学会
• [Remarks]
  • URL: http://www.hsrc.hiroshima-u.ac.jp/
• [Remarks] 受賞 1.第16回 日本放射光学会奨励賞
• [Remarks] 受賞 2.第10回 広島大学学長表彰
• [Remarks] 新聞報道1.中国新聞(27面:平成25年6月10日)「広島大などチームが成功「電子の相互作用を数値化」HDの大容量化に道」
• [Remarks] 新聞報道2.中国新聞(27面:平成24年7月28日)「広島大など研究チーム「電子相関」可視化に成功機器の省電力化期待」
• [Remarks] 新聞報道3.日刊工業新聞(28面:平成24年7月30日)「広島大産総研"電子の反発"観測成功金属酸化物材料へ応用」
• [Remarks] 新聞報道4.化学工業新聞(8面:平成24年7月30日)「電子相関効果金属酸化物中に2通り広島大など、可視化に成功」
• [Remarks] 新聞報道5.鉄鋼新聞(6面:平成24年7月31日)「広島大と産総研金属酸化物の電子相関可視化新デバイス材料に道」
• [Remarks] 新聞報道6.日経産業新聞(7面:平成22年11月17日)「超電導の引き金磁石改良物質も同じ広島大など「格子振動」が関与」
• [Remarks] 新聞報道7.日刊工業新聞(24面:平成22年11月17日)「広島大産総研超電導の対、ナゾ解明ルテニウム酸化物で」
• [Remarks] 新聞報道8.化学工業新聞(5面:平成22年11月17日)「広島大産総研Ru酸化物超電導体電子の運動を可視化機構解明へ手がかり」
• [Remarks] 新聞報道9.中国新聞(31面:平成22年11月17日)「酸化物超伝導の原理解明」
• [Remarks] 新聞報道10.鉄鋼新聞(6面:平成22年11月17日)「広島大と産総研ルテニウム酸化物超電導発現のメカニズム発見」