2011 Fiscal Year Final Research Report
Superconducting gap in high-temperature superconductors
| Project/Area Number |
20244060
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
HANAGURI Tetsuo 独立行政法人理化学研究所, 高木磁性研究室, 専任研究員 (40251326)
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| Co-Investigator(Kenkyū-buntansha) |
KOHSAKA Yuhki 独立行政法人理化学研究所, 無機電子複雑系研究チーム, 基幹研究所研究員 (80455344)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 走査型トンネル顕微鏡 / 銅酸化物超伝導体 / 鉄系超伝導体 / 超伝導ギャップ / 擬ギャップ |
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| Research Abstract |
We have investigated cuprate and iron-based superconductors by scanning tunneling microscopy/spectroscopy. We found that carriers doped into a Mott insulator, which is a parent material of cuprate superconductors, induce a pseudo-gap state which breaks symmetry of the underlying lattice. We developed a technique which enables us to analyze the phase of superconducting gap. Using this new technique, we determined the superconducting-gap structure of an iron-based superconductor. We have also studied electronic states of quantized vortices in these superconductors.
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