Study of novel quantum states in Yb-based compounds
Project/Area Number |
23340099
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Condensed matter physics II
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Research Institution | Tokyo Institute of Technology |
Principal Investigator |
IZAWA Koichi 東京工業大学, 理工学研究科, 教授 (90302637)
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Co-Investigator(Kenkyū-buntansha) |
MACHIDA Yo 東京工業大学, 大学院理工学研究科, 助教 (40514740)
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Project Period (FY) |
2011-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥19,890,000 (Direct Cost: ¥15,300,000、Indirect Cost: ¥4,590,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2012: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2011: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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Keywords | 物性実験 / 低温物性 / 量子臨界点 / 非フェルミ液体 / Yb化合物 / メタ磁性 / 強相関電子系 |
Outline of Final Research Achievements |
In order to understand quantum criticality and anomalous electronic states near a quantum critical point (QCP) in quantum critical materials, we studied the specific heat, Seebeck coefficient, Nernst coefficient, and thermal conductivity of Yb-based strongly correlated electron systems under multi-extreme condition, such as low temperature, high field, and high pressure. Based on these results, we demonstrated the validity of Wiedemann-Franz law even around QCP and also clarified transport properties near metamagnetic transition in YbCo2Zn20,YbRh2Si2,β-YbAlB4. In addition, by means of the new analysis such as the ratio of the Seebeck coefficient to the specific heat, we succeeded to get crucial information for understanding the electronic states near QCP.
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Report
(5 results)
Research Products
(51 results)
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[Journal Article] Anomalous Enhancement of Seebeck Coefficient in Pr-Based 1-2-20 System with Non-Kramers Doublet Ground States2015
Author(s)
Y. Machida, T. Yoshida, T. Ikeura, K. Izawa, A. Nakama, R. Higashinaka, Y. Aoki, H. Sato, A. Sakai, S. Nakatsuji, N. Nagasawa, K. Matsumoto, T. Onimaru, T. Takabatake
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Journal Title
Journal of Physics: Conference Series
Volume: 592
Pages: 0120251-9
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Pairing Symmetry of UPt3 Probed by Thermal Transport Tensors2014
Author(s)
K. Izawa, Y. Machida, A. Itoh, Y. So, K. Ota, Y. Haga, E. Yamamoto, N. Kimura, Y. Onuki, Y. Tsutsumi, and K. Machida
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Journal Title
J. Phys. Soc. Jpn.
Volume: 83
Issue: 6
Pages: 0610131-8
DOI
NAID
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] Anomalous Enhancement of Seebeck Coefficient in Pr-based 1-2-20 System with Non-Kramers Doublet Ground States2014
Author(s)
Y. Machida, T. Ikeura, A. Nakama, R. Higashinaka, Y. Aoki, H. Sato, A. Sakai, S. Nakatsuji, N. Nagasawa, K. T. Matsumoto, T. Onimaru, T. Takabatake, and K. Izawa
Organizer
The International Conference on Strongly Correlated Electron Systems (SCES 2014)
Place of Presentation
France (Grenoble)
Year and Date
2014-07-07 – 2014-07-11
Related Report
Invited
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[Presentation] Quasi-particle transport in multiple superconducting phases of UPt32012
Author(s)
Y.Machida, A.Itoh, Y.So, K.Izawa, Y.Haga, E.Yamamoto, N.Kimura, Y.Onuki, Y.Tsutsumi, K.Machida
Organizer
Japan-French Workshop on Correlated Electronic Systems
Place of Presentation
Grenoble, France
Related Report
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[Presentation] Heavy fermion like behavior of rare earth oxyaresenide (CeO) MnAs2011
Author(s)
Y.Morosawa, M.Onizawa, R.Takeda, C.Moriyoshi, Y.Kuroiwa, Y.Machida, K.Izawa, S.Ohara, T.Watanabe, Y.Takano, K.Takase
Organizer
International Conference on Strongly Correlated Electron Systems 2011
Place of Presentation
ケンブリッジ・英国
Year and Date
2011-08-30
Related Report