2017 Fiscal Year Final Research Report
Development of ultralow temperature and ultrahigh-resolution laser-based photoemission spectroscopy and investigation of the mechanism of exotic superconductors
Project/Area Number |
25220707
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Research Category |
Grant-in-Aid for Scientific Research (S)
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Allocation Type | Single-year Grants |
Research Field |
Condensed matter physics I
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Research Institution | The University of Tokyo |
Principal Investigator |
SHIN SHIK 東京大学, 物性研究所, 教授 (00162785)
|
Co-Investigator(Kenkyū-buntansha) |
石田 行章 東京大学, 物性研究所, 助教 (30442924)
近藤 猛 東京大学, 物性研究所, 准教授 (40613310)
岡崎 浩三 東京大学, 物性研究所, 准教授 (40372528)
|
Project Period (FY) |
2013-05-31 – 2018-03-31
|
Keywords | 光電子分光 / レーザー / 超電導 / 超低温 / 高分解能 |
Outline of Final Research Achievements |
The main purpose in our project is to develop angle-resolved photoelectron spectroscopy (ARPES) which achieves the minimum temperature less than 1K and the highest energy-resolution not reached before, and elucidate the mechanism of unconventional low-temperature superconductors. We have developed the state-of-the-art ARPES equipped with He3 cryostat, which enables an extremely low temperatures less than 1K. We have also developed measurement software which incorporates a photoelectric analyzer and a sCMOS-type camera (not a conventional CCD camera) to allow measurements at a high-speed frame rate. We have demonstrated that an iron-based superconductor is a topological superconductor. In addition, we have succeeded in observation of detailed superconducting gaps in the spin polarization band for the topological material grown as a film on a bulk superconductor.
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Free Research Field |
電子物性
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