Spin-orbit coupled electronic structures studied by bulk-sensitive angle-resolved photoemission spectroscopy
Project/Area Number |
15K05186
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Condensed matter physics II
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Research Institution | Konan University |
Principal Investigator |
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Co-Investigator(Renkei-kenkyūsha) |
SEKIYAMA AKIRA 大阪大学, 大学院基礎工学研究科, 教授 (40294160)
TAKASE KOICHI 日本大学, 理工学部, 教授 (10297781)
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Project Period (FY) |
2015-04-01 – 2018-03-31
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Project Status |
Completed (Fiscal Year 2017)
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Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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Keywords | 電子構造 / 光電子分光 / イリジウム / 酸化物 / スピン軌道 / 角度分解 |
Outline of Final Research Achievements |
In this study, we systematically investigate three-dimensional momentum-resolved electronic structures of Ruddlesden-Popper-type iridium oxides Srn+1IrnO3n+1 using soft-x-ray angle-resolved photoemission spectroscopy. Our results provide direct evidence of an insulator-to-metal transition that occurs upon increasing the dimensionality of the IrO2-plane structure. This transition occurs when the spin-orbit-coupled jeff = 1/2 band changes its behavior in the dispersion relation and moves across the Fermi energy. In addition, an emerging band along the G(0,0,0)-R(π,π,π) direction is found to play a crucial role in the metallic characteristics of SrIrO3. In addition, Sr3Ir2O7 solely showed the transition in conjunction with the magnetic phase transition induced by temperature change.
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Report
(4 results)
Research Products
(17 results)
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[Journal Article] Three-dimensional electronic structures and the metal-insulator transition in Ruddlesden-Popper iridates2016
Author(s)
A. Yamasaki, H. Fujiwara, S. Tachibana, D. Iwasaki, Y. Higashino, C. Yoshimi, K. Nakagawa, Y. Nakatani, K. Yamagami, H. Aratani, O. Kirilmaz, M. Sing, R. Claessen, H. Watanabe, T. Shirakawa, S. Yunoki, A. Naitoh, K. Takase, J. Matsuno, H. Takagi, A. Sekiyama, and Y. Saitoh
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Journal Title
Phys. Rev. B
Volume: 94
Issue: 11
Pages: 1151031-10
DOI
NAID
Related Report
Peer Reviewed / Int'l Joint Research
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