Laser angle-resolved photoemission spectroscopy on unconventional superconductor

Research Project

Project/Area Number	16K17741
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Condensed matter physics II
Research Institution	The University of Tokyo
Principal Investigator	Ota Yuichi 東京大学, 物性研究所, 特任研究員 (60737237)
Project Period (FY)	2016-04-01 – 2018-03-31
Project Status	Completed (Fiscal Year 2017)
Budget Amount *help	¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000) Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000) Fiscal Year 2016: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords	光電子分光 / 超伝導 / 物性実験
Outline of Final Research Achievements	We update our laser-based angle-resolved photoemission spectroscopy apparatus and investigate the superconducting-gap anisotropy in recently discovered BiS2-based superconductor and heavy fermion superconductor CeCoIn5. By carefully adjusting the focal point of the laser and reducing the spot size to as small as ～0.1 mm at the cleaved sample surface, we can probe a region of high quality in the single crystal, and we observe a strongly anisotropic superconducting-gap.

Report

(3 results)