2010 Fiscal Year Final Research Report
Multigap effect on the heavy-fermion superconductors revealed by thermal conductivity
| Project/Area Number |
21740250
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
MACHIDA Yo Tokyo Institute of Technology, 大学院・理工学研究科, 助教 (40514740)
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| Project Period (FY) |
2009 – 2010
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| Keywords | 熱伝導率 / マルチギャップ超伝導 / 重い電子系超伝導 |
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| Research Abstract |
Effect of the electronic correlation on the multigap superconductivity has been investigated on the correlated electron system, including the heavy fermion system. The results have revealed the enhanced heat conduction in the Fe-based multigap superconductor Lu_2Fe_3Si_5 due to the dominant contribution of Fe 3d-electrons to the gap bands. Moreover, the anomalous heat transport phenomena as an indication of unconventional quantum criticality has been found in the first heavy-fermion superconductor β-YbAlB_4.
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