Microscopic investigation of the relation between superconductivity and one-dimensional electronic order in iron-based superconductors
Project/Area Number |
24740242
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Condensed matter physics II
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Research Institution | The Institute of Physical and Chemical Research (2014) Tokyo University of Science (2012-2013) |
Principal Investigator |
MACHIDA Tadashi 独立行政法人理化学研究所, 創発物性科学研究センター, 特別研究員 (60570695)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
|
Keywords | 鉄系超伝導 / 軌道秩序 / 反強磁性秩序 / 走査型トンネル分光 / 鉄系超伝導体 / 軌道自由度 / スピン自由度 / 走査型トンネル分光法 / 国際情報交換 |
Outline of Final Research Achievements |
In this research, we have investigated the real-space electronic structure in Fe1+dTe1-xSex by scanning tunneling microscope. In a parent material Fe1+dTe, we have found the unidirectional electronic structure and isosceles triangular structure around excess Fe atoms. The spatial symmetries of both electronic structures are identical with that of the underlying AFM order. These results can be well-explained by the theoretical model in which the Fund’s rule on each Fe site dominates the electron hopping process. This suggests that the electronic properties in this system are governed by the strength of Fund’s coupling on each Fe site.
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Report
(4 results)
Research Products
(14 results)
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[Journal Article] 5. Effect of excess Fe on magnetic properties and crystallographic phases in Fe1+dTe2013
Author(s)
T. Machida, D. Morohoshi, K. Takimoto, H. Nakamura, H. Takeya, T. Mochiku, S. Ooi, Y. Mizuguchi, Y. Takano, K. Hirata, H. Sakata
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Journal Title
Physica C
Volume: 484
Pages: 19-21
DOI
Related Report
Peer Reviewed
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[Journal Article] 3. Observation of an isosceles triangular electronic structure around the excess iron atoms in Fe1+dTe2013
Author(s)
T. Machida, K. Kogure, T. Kato, H. Nakamura, H. Takeya, T. Mochiku, S. Ooi, Y. Mizuguchi, Y. Takano, K. Hirata, H. Sakata
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Journal Title
Physical Review B
Volume: 87
Issue: 21
Pages: 214508-214508
DOI
Related Report
Peer Reviewed
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[Presentation] Local effect of the excess Fe in Fe1+dTe probed by STM and STS2013
Author(s)
T. Machida, A. Kaneko, H. Kariya, D. Morohoshi, H. Nakamura, H. Takeya, T. Mochiku, S. Ooi, Y. Mizuguchi, Y. Takano, K. Hirata, and H. Sakata
Organizer
Spectroscopy of novel superconductors 2013 (SNS2013)
Place of Presentation
California, USA
Related Report
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[Presentation] Local effect of the excess Fe atom in Fe1+dTe probed by scanning tunneling microscopy and spectroscopy2012
Author(s)
T. Machida, H. Nakamura, D. Morohoshi, H. Kariya, H. Kaneko, H. Takeya, T. Mochiku, S. Ooi, Y. Mizuguchi, Y. Takano, K. Hirata, H. Sakata
Organizer
International Conference of Materials & Mechanisms of Superconductivity
Place of Presentation
アメリカ,ワシントンDC
Related Report