2012 Fiscal Year Final Research Report
X-ray magneto-spectroscopy study on the field-controlled quantum criticality of the valence fluctuation
| Project/Area Number |
22340091
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
MIZUMAKI Masaichiro 高輝度光科学研究センター, 研究員 (60360830)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 強相関系 / 放射光 X 線 / 強磁場 / 相転移 / 量子臨界点 |
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| 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.
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Research Products
(20 results)
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[Journal Article] High-Magnetic-Field X-ray Absorption and Magnetic Circular Dichroism Spectroscopy in the Mixed-Valent Compound YbAgCu2012
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, and Akio Kotani
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Journal Title
J. Phys. Soc. Jpn
Volume: 81
Pages: 114702
DOI
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[Journal Article] Valence Fluctuation in YbAgCu 4 at High Magnetic Fields2012
Author(s)
Y. H. Matsuda, T. Nakamura, J. L. Her, K. Kindo, S. Michimura, T. Inami, M. Mizumaki, N. Kawamura, M. Suzuki, B. Chen, H. Ohta, and K. Yoshimura
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Journal Title
J. Phys. Soc. Jpn
Volume: 81
Pages: 015002 1-2
DOI
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[Presentation] High Magnetic Field X-ray Spectroscopy of Heavy Fermion Systems2012
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
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[Presentation] 重い電子系YbAgCu4の強磁場XMCD2011
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
Year and Date
20110921-24
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[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
Year and Date
20100923-24
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