Study of exciton condensation in the visinity of insulator-to-metal transition
| Project/Area Number |
26870265
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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
Condensed matter physics I
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 強相関電子系 / 金属絶縁体転移 / 励起子絶縁体 / 発光分光 / 高圧物性 / 励起子 / 非線形伝導 / 光物性 |
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| Outline of Final Research Achievements |
Experimental elucidation of the Bose-Einstein condensation of an exciton (bound state of an electron and a hole) with infinite lifetime is one of a challenging topic in condensed matter physics. In this study, we focus on SmS which is a prototypical compound that exhibits pressure-induced insulator-to-metal transition in order to elucidate the possibility of the exciton condensation.
Combining with transport and angle-resolved photoemission spectroscopy measurement, we have observed an insulator-to-metal transition in the Black phase which has been thought to be an insulator phase so far. We have also found a clear non-linear conduction phenomenon including negative differential resistance in the vicinity of the transition. These results give important insight into further study of exciton condensation.
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Report
(4 results)
Research Products
(18 results)
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[Presentation] 価数揺動物質SmSの静水圧下超音波実験2017
Author(s)
赤津光洋, 瓦井有香, 三本啓輔, 根本祐一, 後藤輝孝, 井村敬一郎, 佐藤憲昭, 鈴木博之
Organizer
日本物理学会 第72回年次大会
Place of Presentation
大阪大学豊中キャンパス
Year and Date
2017-03-17
Related Report
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[Presentation] Study on electronic states of the mixed-valence compound SmS by resonance x-ray emission spectroscopy under high pressure2016
Author(s)
K. Imura, Y. Suzuki, N. Kawade, Y. Yamamoto, H. Yamaoka, N. Hiraoka, H. Ishii, H. S. Suzuki, J. Mizuki, K. Deguchi and N. K. Sato
Organizer
International Conference on Low Energy Electrodynamics in Solids
Place of Presentation
Hotel LAFORET Biwako, Japan
Year and Date
2016-05-30
Related Report
Int'l Joint Research
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[Presentation] Photo-induced phase transition of SmS2016
Author(s)
Yusuke Takeno, Yusuke Negoro, Simon, Hiroshi Watanabe, Keiichiro Imura, Hiroyuki Suzuki, Noriaki Kensho Sato, and Shin-ichi Kimura
Organizer
International Conference on Low Energy Electrodynamics in Solids
Place of Presentation
Hotel LAFORET Biwako, Japan
Year and Date
2016-05-30
Related Report
Int'l Joint Research
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[Presentation] 高圧下共鳴発光分光による価数揺動物質SmSの電子状態の研究2016
Author(s)
鈴木葉, 河出直哉, 井村敬一郎, 山本義哉, 山岡人志, 平岡望, 石井啓文, 鈴木博之, 水木純一郎, 出口和彦, 佐藤憲昭
Organizer
日本物理学会 第71回年次大会
Place of Presentation
東北学院大学 泉キャンパス
Year and Date
2016-03-19
Related Report
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[Presentation] SmSの光誘起相転移ダイナミクス2016
Author(s)
根来雄介, 竹野祐輔, 渡邊浩, 井村敬一郎, 鈴木博之, 佐藤憲昭, 木村真一
Organizer
日本物理学会 第71回年次大会
Place of Presentation
東北学院大学 泉キャンパス
Year and Date
2016-03-19
Related Report
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[Presentation] Origin of the black-golden transition inSm1-xYxS2014
Author(s)
keiichiro Imura, Mai Saito, Masaki Kaneko, Takahiro Ito, Tetsuya Hajiri, Masaharu Matsunami, Shi-ichi Kimura, Kazuhiko Deguchi, Hiroyuki S. Suzuki, Noriaki K. Sato
Organizer
The International Conference on Strongly Correlated Electron Systems (SCES2014)
Place of Presentation
Grenoble, France
Year and Date
2014-07-07 – 2014-07-11
Related Report
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