Aspects of the Superconducting State Coexisting with Antiferromagnetism: Approach from the Fermi Surface Measurements
| Project/Area Number |
26400345
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 強相関系 / 重い電子系 / 反強磁性 / フェルミ面 / 超伝導 / 磁気抵抗 |
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| Outline of Final Research Achievements |
Some heavy fermion compounds exhibit an unusual coexistence of antiferromagnetism and superconductivity. To gain deeper understanding this phenomenon, In this research project we focused on the electronic structure of these compounds. In particular, we performed the pressure dependence of the de Haas-van Alphen (dHvA) and magnetoresistance for the pressure-induced heavy-fermion superconductors CeRhSi3 and CeIrSi3. We revealed that the dHvA oscillation of CeRhSi3 does not change between inside and outside the antiferromagnetic state. As for CeIrSi3, we revealed that the electronic state is qualitatively different from that of CeRhSi3. Some differences in the superconducting properties between CeRhSi3 and CeIrSi3 are also clarified. These results suggest that the electronic structure in CeTSi3 series is sensitive to the correlation between f-electron and conduction electrons and that a difference of the correlation affects detailed nature of unconventional superconductivity.
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Report
(4 results)
Research Products
(47 results)
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[Journal Article] Quantum critical point and unusual phase diagram in the itinerant-electron metamagnet UCoAl2015
Author(s)
N. Kimura, N. Kabeya, H. Aoki, K. Ohyama, M. Maeda, H. Fujii, M. Kogure, T. Asai, T. Komatsubara, T. Yamamura, I. Satoh
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Journal Title
Physical Review B
Volume: 92
Issue: 3
Pages: 1-9
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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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] Quantum Critical Point of UCoAl determined by AC Magnetic Susceptibility2015
Author(s)
N. Kimura, N. Kabeya, K. Ohyama, M. Maeda, H. Fujii, M. Kogure, T. Asai, H. Aoki, T. Komatsubara, T. Yamamura, I. Satoh
Organizer
International Conference on Magnetism 2015
Place of Presentation
Palau de Congressos de Catalunya, Barcelona, Spain
Year and Date
2015-07-09
Related Report
Int'l Joint Research
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[Presentation] Fermi Surface properties in impurity kondo effect : Quantum oscillation study on CexLa1-xRu2Si2 and UxTh1-xRu2Si22015
Author(s)
Y. Matsumoto, Y. Haga, N. Tateiwa, N. Kimura, H. Aoki, E. Yamamoto, S. Ohara, Z. Fisk, H. Yamagami
Organizer
International Conference on Magnetism 2015
Place of Presentation
Palau de Congressos de Catalunya, Barcelona, Spain
Year and Date
2015-07-07
Related Report
Int'l Joint Research
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