Electronic structures near quantum critical points studied by infrared spectroscopy under high pressure
| Project/Area Number |
23540409
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Kobe University |
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Principal Investigator |
OKAMURA Hidekazu 神戸大学, 理学(系)研究科(研究院), 准教授 (00273756)
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| Co-Investigator(Renkei-kenkyūsha) |
MORIWAKI Taro 高輝度光科学研究センター, 副主幹研究員 (90372143)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | SrFe2As2 / CeRhIn5 / 赤外分光 / シンクロトロン放射光 / 高圧力 / ダイヤモンドアンビルセル / 電子状態 / 高圧 / 赤外 / 重い電子系 / SPring-8 / 強相関電子系 |
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| Research Abstract |
In this work, the electronic structures of SrFe2As2 and CeRhIn5 were studied under high pressure up to 8 GPa (80,000 bar) and at low temperatures down to 6 K using infrared spectroscopy. These compounds become superconducting under high pressure above 4 GPa (SrFe2As2) and 2 GPa (CeRhIn5), and have attracted a lot of recent interest from condensed matter physicists. To generate high pressure, a diamond anvil cell (DAC) was used, and to perform infrared spectroscopy on a small sample contained in DAC, the highly bright, infrared synchrotron radiation from SPring-8 was utilized. The measured results showed that the electronic structures of these compounds are strongly affected by the external pressure, which were analyzed in detail.
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Report
(4 results)
Research Products
(42 results)
