X-ray magneto-spectroscopy study on the field-controlled quantum criticality of the valence fluctuation

• Project/Area Number: 22340091
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: The University of Tokyo
• Principal Investigator: MATSUDA Yasuhiro 東京大学, 物性研究所, 准教授 (10292757)
• Co-Investigator(Kenkyū-buntansha): MIZUMAKI Masaichiro 高輝度光科学研究センター, 研究員 (60360830)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000); Fiscal Year 2012: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2011: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2010: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
• Keywords: 強相関系 / 放射光 X 線 / 強磁場 / 相転移 / 量子臨界点 / 価数揺らぎ / 量子臨界 / 重い電子 / エックス線分光 / 放射光X線 / パルス強磁場 / 価数揺動 / パルス磁場

Research Abstract

The charge fluctuation phenomena in rare-earth intermetalliccompounds at high magnetic fields of up to 40 Tesla were directly observed by using thehigh magnetic field x-ray absorption spectroscopy. The charge fluctuation phenomenon wasrecently proposed to be the origin of exotic phenomena such as unconventionalsuperconductivity. It is important to experimentally investigate the magnetic fielddependence of the fluctuation and compare the results to the theoretical predictions. In thisstudy, it has been found for the first time that the charge fluctuation can strongly dependon magnetic field as theoretically predicted.

Research Products

• [Journal Article] X-ray Diffraction and Absorption Spectroscopy in Pulsed High Magnetic Fields (2013)
  • Author(s): Yasuhiro H. Matsuda
  • Journal Title: Journal of the Physical Society of Japan Volume: 82 Issue: 2 Pages: 21009-21009
  • DOI: 10.7566/jpsj.82.021009
  • Peer Reviewed
• [Journal Article] Suppression of f-electron itinerancy in CeRu_2Si_2 by a strong magnetic field (2012)
  • Author(s): Y. H. Matsuda, T. Nakamura, J. L. Her, S. Michimura, T. Inami, K. Kindo, and T. Ebihara
  • Journal Title: Phys. Rev. B Volume: Vol. 86 Issue: 4 Pages: 1-4
  • DOI: 10.1103/physrevb.86.041109
  • Peer Reviewed
• [Journal Article] High Magnetic Field X-ray Absorption and Magnetic Circular Dichroism Spectroscopy in the Mixed-Valent Compound YbAgCu_4 (2012)
  • Author(s): Toshiyuki Nakamura, Yasuhiro H. Matsuda, Jim-Long Her, Koichi Kindo, Shinji Michimura, Toshiya Inami, Masaichiro Mizumaki, Naomi Kawamura, Motohiro Suzuki, Bin Chen, Hiroto Ohta, Kazuyoshi Yoshimura, Akio Kotani
  • Journal Title: J. Phys. Soc. Jpn Volume: Vol. 81 Issue: 11 Pages: 114702-114702
  • DOI: 10.1143/jpsj.81.114702
  • Peer Reviewed
• [Journal Article] X-ray Spectroscopies in Pulsed High Magnetic Fields: New Frontier with Flying Magnets and Rolling Capacitor Banks (2012)
  • Author(s): Y. Narumi, T. Nakamura, T. Kinoshita, Y. H. Matsuda, and H. Nojiri
  • Journal Title: Synchrotron Radiation News Volume: Vol.25,No.6 Issue: 6 Pages: 12-17
  • DOI: 10.1080/08940886.2012.736833
  • Peer Reviewed
• [Journal Article] Valence Fluctuation in YbAgCu4 at highmagnetic fields (2012)
  • Author(s): Y. H. Matsuda, T. Nakamura, J.-L. Her, S. Michimura, T. Inami, M. Mizumaki, N. Kawamura, M. Suzuki, B. Chen, H. Ohta, and K. Yoshimura
  • Journal Title: J. Phys. Soc. Jpn. Volume: 81 Issue: 1 Pages: 0150021-2
  • DOI: 10.1143/jpsj.81.015002
  • Peer Reviewed
• [Journal Article] Orbital magnetism in Cd2Os2O studied by x-ray magnetic circular dichroism (2011)
  • Author(s): Y. H. Matsuda, J. L. Her, S. Michimura, T. Inami, M. Suzuki, N. Kawamura, M. Mizumaki, K. Kindo, J. Yamauara, and Z. Hiroi
  • Journal Title: Phys. Rev. B Volume: 84 Issue: 17 Pages: 1744311-5
  • DOI: 10.1103/physrevb.84.174431
• [Journal Article] Orbital magnetism in Cd_2OS_2O_7 studied by x-ray magnetic circular dichroism (2011)
  • Author(s): Y.H.Matsuda, 他
  • Journal Title: Phys.Rev.B Volume: 84
  • Peer Reviewed
• [Journal Article] パルス強磁場を用いた放射光X線分光:磁場中電子状態の解明へ (2011)
  • Author(s): 松田康弘
  • Journal Title: 放射光 Volume: 24 Pages: 131-139
  • NAID: 10028149711
• [Journal Article] Magnetoelastics of a Spin Liquid : X-Ray Diffraction Studies of Tb_2Ti_2O_7 in Pulsed Magnetic Fields (2010)
  • Author(s): J.P.C.Ruff, 他
  • Journal Title: Phys.Rev.Lett. Volume: 105 Pages: 0772031-4
  • Peer Reviewed
• [Presentation] High Magnetic Field X-ray Spectroscopy of Heavy Fermion Systems (2012)
  • Author(s): Yasuhiro H. Matsuda
  • Organizer: Spectroscopy of Rare-Earth Materials at Extreme Conditions: Structure, Magnetism and Energy, The joint annual users meeting of the Advanced Photon Source
  • Place of Presentation: Center of Nanoscale Materials, and Electron Microscopy Center of Argonne National Laboratory Argonne, IL, USA
  • Year and Date: 2012-05-09
• [Presentation] 強磁場X線分光実験のための小型パルスマグネット冷却方式の改善 (2012)
  • Author(s): 中村俊幸、松田康弘, ほか
  • Organizer: 日本物理学会2012年年次大会
  • Place of Presentation: 関西学院大学(西宮市)
  • Year and Date: 2012-03-27
• [Presentation] 強磁場下のYbAgCu_4のYbL_3吸収端XMCDにおける電気四重極子遷移 (2012)
  • Author(s): 小谷章雄、松田康弘
  • Organizer: 日本物理学会2012年年次大会
  • Place of Presentation: 関西学院大学(西宮市)
  • Year and Date: 2012-03-27
• [Presentation] 重い電子系CeRu2Si2及びCeRh2Si2の強磁場でのCe価数 (2012)
  • Author(s): 松田康弘,中村俊幸,道村真司,稲見俊哉,金道浩一,海老原孝雄,網塚浩
  • Organizer: 日本物理学会2012年秋季大会
  • Place of Presentation: 横浜国立大学
• [Presentation] Synchrotron X-ray spectroscopy study on the valence state in α- and β-YbAlB4 at low temperatures and high magnetic fields (2012)
  • Author(s): Y. H. Matsuda, T. Nakamura, K. Kuga, Y.Matsumoto, S. Nakatsuji, S. Michimura, T. Inami, N. Kawamura, M. Mizumaki
  • Organizer: The 19th International Conference (ICM) on Magnetism with Strongly Correlated Electron Systems (SCES) Busan
  • Place of Presentation: Korea
• [Presentation] Valence state of YbRh2Si2 at high magnetic fields (2012)
  • Author(s): H. Nakai, T. Ebihara, S. Tsutsui, S. Michimura, T. Inami, T. Nakamura, K. Kindo and Y. H.Matsuda
  • Organizer: The 10th International Conference on Research in High Magnetic Fields
  • Place of Presentation: Wuhan, China
• [Presentation] Synchrotron X-ray Absorption Study on the Valence Fluctuation in Ce-based Heavy Fermion Compounds at High Magnetic Fields (2012)
  • Author(s): Y. H. Matsuda, T. Nakamura, J. L. Her, S.Michimura, T. Inami, T. Ebihara, H. Amitsuka
  • Organizer: The 10th International Conference on Research in High Magnetic Fields
  • Place of Presentation: Wuhan, China
• [Presentation] 強磁場下のYbAgCu4のYbL吸収端XMCDにおける電気四重極子遷移 (2012)
  • Author(s): 小谷章雄,松田康弘
  • Organizer: 日本物理学会2012年第67回年次大会
  • Place of Presentation: 関西学院大学西宮上ヶ原キャンパス
• [Presentation] High Magnetic Field X-ray Spectroscopy of Heavy Fermion Systems (2012)
  • Author(s): Yasuhiro H. Matsuda
  • Organizer: Spectroscopy of Rare-Earth Materials at Extreme Conditions: Structure, Magnetism and Energy
  • Place of Presentation: Argonne National Laboratory, Argonne, IL, USA
  • Invited
• [Presentation] Synchrotron X-ray Absorption Study on the Valence Fluctuation in Ce-based Heavy Fermion Compounds at High Magnetic Fields (2012)
  • Author(s): Y. H. Matsuda, T. Nakamura, J. L. Her, S. Michimura, T. Inami, T. Ebihara, H. Amitsuka
  • Organizer: The 10th International Conference on Research in High Magnetic Fields
  • Place of Presentation: Wuhan, China
• [Presentation] Synchrotron X-ray spectroscopy study on the valence state in α- and β-YbAlB4 at low temperatures and high magnetic fields (2012)
  • Author(s): Y. H. Matsuda, T. Nakamura, K. Kuga, Y. Matsumoto, S. Nakatsuji, S. Michimura, T. Inami, N. Kawamura, M. Mizumaki
  • Organizer: The 19th International Conference (ICM) on Magnetism with Strongly Correlated Electron Systems (SCES)
  • Place of Presentation: Busan, Korea
• [Presentation] High Magnetic Field X-Ray Spectroscopy of Yb and Ce Intermetallic Compounds (2011)
  • Author(s): Yasuhiro H.Matsuda
  • Organizer: Workshop on Heavy Fermions (TOKIMEKI 2011)
  • Place of Presentation: 大阪大学(豊中市)(招待講演)
  • Year and Date: 2011-11-23
• [Presentation] CeRu_Si_2の強磁場磁化と価数 (2011)
  • Author(s): 中村俊幸、松田康弘, ほか
  • Organizer: 日本物理学会2011秋季大会
  • Place of Presentation: 富山大学(富山市)
  • Year and Date: 2011-09-23
• [Presentation] 重い電子系YbAgCu_4の強磁場XMCD (2011)
  • Author(s): 松田康弘, ほか
  • Organizer: 日本物理学会2011秋季大会
  • Place of Presentation: 富山大学(富山市)
  • Year and Date: 2011-09-22
• [Presentation] 強相関電子系の強磁場X線分光 (2011)
  • Author(s): 松田康弘
  • Organizer: PF研究会「軟X線分光・散乱測定を用いた物性研究の現状と展望」
  • Place of Presentation: 高エネルギー加速器研究機構(つくば市)(招待講演)
  • Year and Date: 2011-09-13
• [Presentation] YbAgCu4の磁場誘起価数転移 (2011)
  • Author(s): 中村俊幸, 他
  • Organizer: 日本物理学会2011春季大会
  • Place of Presentation: 新潟大学五十嵐キャンパス
  • Year and Date: 2011-03-26
• [Presentation] YbAgCu4の強磁場磁化と価数 (2011)
  • Author(s): 中村俊幸, 他
  • Organizer: 日本物理学会2010秋期大会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
  • Year and Date: 2011-03-25
• [Presentation] 重い電子系CeRu2Si2の強磁場価数 (2011)
  • Author(s): 松田康弘, 他
  • Organizer: 日本物理学会2011春季大会
  • Place of Presentation: 新潟大学五十嵐キャンパス
  • Year and Date: 2011-03-25
• [Presentation] High Magnetic Field X-Ray Spectroscopy of Yb and Ce Intermetallic Compounds (2011)
  • Author(s): Yasuhiro H. Matsuda
  • Organizer: Workshop on Heavy Fermions (TOKIMEKI 2011) in Osaka
  • Place of Presentation: Osaka, Japan
• [Presentation] 重い電子系YbAgCu4の強磁場XMCD (2011)
  • Author(s): 松田康弘,中村俊幸,何金龍,金道浩一,道村真司,稲見俊哉,水牧仁一朗,河村直己,鈴木基寛,陳斌,太田寛人,吉村一良
  • Organizer: 日本物理学会2011秋季大会
  • Place of Presentation: 富山大学五福キャンパス
• [Presentation] CeRu2Siの強磁場磁化と価数 (2011)
  • Author(s): 中村俊幸,松田康弘,金道浩一,道村真司,稲見俊哉,海老原孝雄
  • Organizer: 日本物理学会2011秋季大会
  • Place of Presentation: 富山大学五福キャンパス
• [Presentation] High Magnetic Field X-ray Experiments using Miniature Magnets (2010)
  • Author(s): Y. H. Matsuda
  • Organizer: Workshop SOLEIL on High Magnetic Field Spectroscopy Saint-Aubin
  • Place of Presentation: France
• [Presentation] YbAgCu4の強磁場磁化と価数 (2010)
  • Author(s): 中村俊幸,何金龍,松田康弘,金道浩一,稲見俊哉,道村真司,水牧仁一朗,河村直己,鈴木基寛,陳斌,太田寛人,吉村一良
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス
• [Presentation] X線吸収分光でみる強相関電子系の強磁場電子状態 (2010)
  • Author(s): 松田康弘
  • Organizer: 第13回XAFS討論会
  • Place of Presentation: 立命館大学びわこくさつキャンパス
• [Book] 磁場中電子状態の解明へ日本放射光学会誌「放射光」 (2011)
  • Author(s): 松田康弘
  • Publisher: 日本放射光学会
• [Remarks]
  • URL: http://ymatsuda.issp.u-tokyo.ac.jp/publication/publication.html
• [Remarks] 研究業績
  • URL: http://ymatsuda.issp.u-tokyo.ac.jp/publication/publication.html
• [Remarks]
  • URL: http://ymatsuda.issp.u-tokyo.ac.jp/publication/publication.html