2016 Fiscal Year Final Research Report
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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| Keywords | 強相関系 |
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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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| Free Research Field |
数物系科学
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