Oscillatory structure with a frequency of THz range using ferroelectric polarization and the enhancement by electric field
| Project/Area Number |
16K14235
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Electronic materials/Electric materials
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
Norifumi Fujimura 大阪府立大学, 工学(系)研究科(研究院), 教授 (50199361)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | THz発振 / 強相関係物質 / 強誘電体 / 光誘起電流 / YMnO3 / 強相関強誘電体 / THz電磁波 |
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| Outline of Final Research Achievements |
By monitoring the optical emission from the plasma during deposition, excellent epitaxial films of YbFe2O4, YMnO3, BiFeO3 were successfully obtained. Novel phenomena such as photo-induced current and spin modulation were clearly recognized in YbFe2O4, fims. For the YMnO3 films, the relationship between photo-induced current and polarization switching and an oscillatory structure with a frequency of 5.1 THz, which is assigned to the coherent optical phonon with A1 symmetry. The oscillatory structure with a frequency 0.58 originated from magnon was observed as well. In the case of BiFeO3 epitaxial fims, the oscillatory structure with a frequency of 2.5 THz by coherent optical phonon was recognized.
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Report
(3 results)
Research Products
(86 results)
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[Journal Article] Strain dependent electronic structure and band offset tuning at heterointerfaces of ASnO3 (A=Ca, Sr, and Ba) and SrTiO32017
Author(s)
John D. Baniecki, Takashi Yamazaki, Dan Ricinschi, Quentin Van Overmeere, Hiroyuki Aso, Yusuke Miyata, Hiroaki Yamada, Norifumi Fujimura, Ronald Maran, Toshihisa Anazawa, Nagarajan Valanoor, and Yoshihiko Imanaka
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Journal Title
Scientific Reports
Volume: 7
Issue: 1
Pages: 417251-12
DOI
Related Report
Peer Reviewed
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