Upgrading of Microspectroscopic Technique under Extreme Conditions and Understanding of Strongly Correlated Electron Systems

2012 Fiscal Year Final Research Report

• Project/Area Number: 22560659
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Physical properties of metals
• Research Institution: Osaka University
• Principal Investigator: IRIZAWA Akinori 大阪大学, 産業科学研究所, 助教 (90362756)
• Co-Investigator(Kenkyū-buntansha): KATO Ryuko 大阪大学, 産業科学研究所, 准教授 (20273708)
• Co-Investigator(Renkei-kenkyūsha): HIGASHIYA Atsushi 摂南大学, 理工学部基礎理工学機, 講師 (70415272)
• Project Period (FY): 2010 – 2012
• Keywords: 光物性 / 多元極限 / 赤外 / テラヘルツ / 顕微分光 / 自由電子レーザー

Research Abstract

The spectroscopy under extreme conditions has been studied and established at the energy from Fermi level to 10 meV above which is important energy region for understanding electronic states of strongly correlated electron systems. Optical studies in an infrared-terahertz region using a synchrotron radiation (SR) or a free electron laser (FEL) that have an advantage of brightness at around the wavelength of 100 μm have been investigated for evolving spectro-microscopy for small samples under low temperature, high pressure, and strong magnetic field. The success of polarization control of FEL enabled experiments in an infrared-terahertz region about vibrational circular dichroism (VCD) in optically active compounds or magnetically circular dichroism (MCD) in magnetic compounds. High speed spectroscopic imaging experiments were realized as a pulse-by-pulse raster scan method.

Research Products

• [Journal Article] Feed-forward control of the amplitude and the phase of a high-power RF pulse based on the overdrive technique (2012)
  • Author(s): Keigo Kawase, Yutaka Morio, Yukiyoshi Kon, Masaki Fujimoto, Sho Hirata, Jie Shen, Ryukou Kato, Akinori Irizawa, Goro Isoyama, and Shigeru Kashiwagi
  • Journal Title: Nucl. Instrum. Meth.Phys. Res. A Volume: 679 Pages: 44
  • DOI: DOI:10.1016/j.nima.2012.03.004
  • Peer Reviewed
• [Journal Article] Direct observation of a pressure-induced metal-insulator transition in LiV_2O_4 by optical studies (2011)
  • Author(s): A. Irizawa, S. Suga, G. Isoyama, K. Shimai, K. Sato, K. Iizuka, T. Nanba, A. Higashiya, S. Niitaka, and H. Takagi
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 235116
  • DOI: DOI:10.1103/PhysRevB.84.235116
  • Peer Reviewed
• [Journal Article] Optical study of charge instability in CeRu_2Al_10 in comparison with CeOs_2Al_10and CeFe_2Al_10 (2011)
  • Author(s): S. Kimura, T. Iizuka, H. Miyazaki, T. Hajiri, M. Matsunami, T. Mori, A. Irizawa, Y. Muro, J. Kajino, and T. Takabatake
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 165125
  • DOI: DOI:10.1103/PhysRevB.84.165125
  • Peer Reviewed
• [Journal Article] Electronic-Structure-Driven Magnetic Ordering in a Kondo Semiconductor CeOs_2Al_10 (2011)
  • Author(s): Shin-ichi Kimura, Takuya Iizuka, Hidetoshi Miyazaki, Akinori Irizawa, Yuji Muro, and Toshiro Takabatake
  • Journal Title: Phys. Rev. Lett. Volume: 106 Pages: 056404
  • DOI: DOI:10.1103/PhysRevLett.106.056404
  • Peer Reviewed
• [Journal Article] Optical study on strongly correlated electron system LiV_2O_4 (2010)
  • Author(s): A. Irizawa, K. Shimai, T. Nanba, S. Niitaka, and H. Takagi
  • Journal Title: Proc. Int. Conf. Magnetism (ICM09), Journal of Phys.: Conf. Ser. Volume: 200 Pages: 012068-1-4
  • Peer Reviewed
• [Presentation] Terahertz Spectroscopy and Imaging by means of ISIR THz-FEL at Osaka University (2013)
  • Author(s): A. Irizawa, R. Kato, K. Kawase, M. Fujimoto, F. Kamitsukasa, H. Ohsumi, M. Yaguchi, S. Suemine, S. Suga, G. Isoyama
  • Organizer: The 16th SANKEN International Symposium 2013 / The 11th SANKEN Nanotechnology Symposium 2013
  • Place of Presentation: Osaka University, Ibaraki, Osaka, Japan
  • Year and Date: 20130122-23
• [Presentation] A high-power semiconductor switch for the L-band linac (2013)
  • Author(s): F. Kamitsukasa, A. Tokuchi, S. Suemine, K. Furukawa, K. Kubo, R. Kato, K. Kawase, A. Irizawa, M. Fujimoto, H. Ohsumi, M. Yaguchi, G. Isoyama
  • Organizer: The 16th SANKEN International Symposium 2013 / The 11th SANKEN Nanotechnology Symposium 2013
  • Place of Presentation: Osaka University, Ibaraki, Osaka, Japan
  • Year and Date: 20130122-23
• [Presentation] Spectral Behavior of High Power Terahertz FEL (2013)
  • Author(s): R. Kato, H. Ohsumi, A. Irizawa, K. Kawase, M. Fujimoto, F. Kamitsukasa, M. Yaguchi, S.Suemine, G. Isoyama
  • Organizer: he 16th SANKEN International Symposium 2013 / The 11th SANKEN Nanotechnology Symposium 2013
  • Place of Presentation: Osaka University, Ibaraki, Osaka, Japan
  • Year and Date: 20130122-23
• [Presentation] Novel Method for Evaluation of the FEL Gain (2013)
  • Author(s): Masaki Fujimoto, Ryukou Kato, Keigo Kawase, Akinori Irizawa, Fumiyoshi Kmaitsukasa, Hiroki Ohsumi, Masaki Yaguchi, Goro Isoyama
  • Organizer: he 16th SANKEN International Symposium 2013 / The 11th SANKEN Nanotechnology Symposium 2013
  • Place of Presentation: Osaka University, Ibaraki, Osaka, Japan
  • Year and Date: 20130122-23
• [Presentation] *K. Kawase, R. Kato, A. Irizawa, M. Fujimoto, F. Kamitsukasa, H. Ohsumi, M. Yaguchi, S. Suemine, G. Isoyama (2013)
  • Author(s): Development of 27 MHz Micropulase Operation in the L-band Linac at ISIR, Osaka University
  • Organizer: The 16th SANKEN International Symposium 2013 / The 11th SANKEN Nanotechnology Symposium 2013
  • Place of Presentation: Osaka University, Ibaraki, Osaka, Japan
  • Year and Date: 20130122-23
• [Presentation] Terahertz Free Electron Laser at Osaka University (2012)
  • Author(s): Akinori Irizawa, Keigo Kawase, Ryukou Kato, Masaki Fujimoto, Fumiyoshi Kamitsukasa, Hiroki Ohsumi, Masaki Yaguchi, Shigemasa Suga, Goro Isoyama
  • Organizer: International Symposium on Frontiers in THz Technology (FTT2012)
  • Place of Presentation: Nara, Japan
  • Year and Date: 20121126-30
• [Presentation] カルシウムフェライト型化合物NaCr2O4の光学応答II (2012)
  • Author(s): 入澤明典,菅滋正,磯山悟朗,飯塚拓也,木村真一,櫻井裕也,室町英治
  • Organizer: 日本物理学会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-21
• [Presentation] カルシウムフェライト型化合物NaCr2O4の光学応答 (2012)
  • Author(s): 入澤明典,磯山悟朗,飯塚拓也,木村真一,櫻井裕也,室町英治
  • Organizer: 日本物理学会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-27
• [Presentation] 高強度FELテラヘルツ光を用いた利用実験 (2012)
  • Author(s): 入澤明典,加藤龍好,川瀬啓悟,藤本將輝,沈傑,平田祥,上司文善,大角寛樹,菅滋正,磯山悟朗
  • Organizer: 日本放射光学会
  • Place of Presentation: 鳥栖文化会館
  • Year and Date: 2012-01-09
• [Presentation] 高強度FELテラヘルツ光を用いた利用実験の可能性 (2011)
  • Author(s): 入澤明典,加藤龍好,川瀬啓悟,東谷篤志,沈傑,平田祥,藤本將輝,大角寛樹,上司文善,菅滋正,磯山悟朗
  • Organizer: 日本物理学会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-21
• [Presentation] Electronic States of One-dimensional Ca_1-xNa_xCo_2O_4 Probed by IR-THz Spectroscopy (2010)
  • Author(s): Akinori Irizawa, M. Isobe, R. Kato, G. Isoyama
  • Organizer: International Conference on Infrared, Millimeter, and Teraherz Waves (IRMMW-THz 2010)
  • Place of Presentation: Rome, Italy
  • Year and Date: 20100905-10
• [Presentation] 赤外分光法による一次元系物質Ca1-xNaxCo2O4の電子状態の研究II (2010)
  • Author(s): 入澤明典,磯部雅朗
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-24
• [Presentation] Sr_2Ir_1-xRh_XO_4における光学測定から見たスピン・軌道相互作用 (2010)
  • Author(s): 入澤明典,磯部雅朗, 飯塚拓也, 木村真一
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Remarks]
  • URL: http://www.sanken.osaka-u.ac.jp/labs/as/index.html
• [Patent(Industrial Property Rights)] 撮像システム及び撮像方法 (2013)
  • Inventor(s): 磯山悟朗、加藤龍好、入澤明典、川瀬啓悟、小田直樹、須藤孝行、大久保修一
  • Industrial Property Rights Holder: 日本電気、日本アビオニクス、大阪大学
  • Industrial Property Number: 特願 2013-030165
  • Filing Date: 2013-02-19