2013 Fiscal Year Final Research Report
Control of Electronic Properties of Materials Using Ultrahigh Electric Field at Electrochemical Interfaces
| Project/Area Number |
21224009
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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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 | The University of Tokyo (2010-2013)
Tohoku University (2009) |
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Principal Investigator |
IWASA Yoshihiro 東京大学, 工学(系)研究科(研究院), 教授 (20184864)
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| Co-Investigator(Kenkyū-buntansha) |
NOJIMA Tsutomu 東北大学, 金属材料研究所, 准教授 (80222199)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKENOBU Taishi 早稲田大学, 先端理工学研究科, 教授 (70343035)
SHIMOTANI Hidekazu 東北大学, 理学研究科, 准教授 (60418613)
KASAHARA Yuichi 東京大学, 工学系研究科, 助教 (10511941)
UENO Kazunori 東京大学, 総合文化研究科, 准教授 (10396509)
TAKEYA Jun 東京大学, 新領域創成科学研究科, 教授 (20371289)
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| Project Period (FY) |
2009-05-11 – 2014-03-31
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| Keywords | 低温物性 / 超伝導材料・素子 / 表面・界面物性 / 電界効果トランジスタ |
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| Research Abstract |
We have developed electric double layer transistor (EDLT) devices, which allows us a high density carrier accumulation exceeding the limit of all solid field effect transistors, taking the advantage of the ultrahigh electric field generated at the electrochemical interfaces. We applied this technique to a wide range of materials including bulk crystals, thin films, and nanodevices fabricated by an exfoliation method combined with electron beam lithography. We succeeded in electrical phase control of superconductivity, ferromagnetism, and Mott-Hubbard transitions in various materials, among which we were able to encounter novel phenomena which are impossible in conventional all solid field effect transistors. We also found novel functions of EDLTs, such as electrical control of spin polarization and flexible devices, all of which indicates that EDLT is an extremely powerful technique to further broaden materials science.
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Research Products
(32 results)
