2017 Fiscal Year Final Research Report
Exploration of pseudogap in organic superconductors by pump probe spectroscopy
| Project/Area Number |
15K17685
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 有機分子結晶 / 擬ギャップ / ポンププローブ分光 |
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| Outline of Final Research Achievements |
In this study, we carried out the pump probe spectroscopy in organic molecular superconductors, which have different electron correlation, to investigate the pseudgap (PG) and its relationship with superconductivity (SC) in terms of electron correlation. As a result, we find that the PG responses are observed at 70-80 K, which are much higher than the SC transition temperature (Tc) of 10-13 K. Moreover, their temperature dependences are different from each compound, indicating that the electron correlation plays crucial role for emergence of the PG. On the other hand, below Tc, the SC responses are observed in addition to the PG responses. This implies that PG and SC are coexisted below Tc. From the measurements under rapid cooling conditions, we reveal that a structural ordering of molecules affects the PG response.
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| Free Research Field |
光物性
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