Search for superconductivity in spin-orbit coupling induced Mott insulators

2013 Fiscal Year Final Research Report

• Project/Area Number: 24740245
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: National Institute for Materials Science
• Principal Investigator: OKABE Hirotaka 独立行政法人物質・材料研究機構, 超伝導物性ユニット, NIMSポスドク研究員 (20406838)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: 強相関系

Research Abstract

The spin-orbit coupling induced Mott insulator Ba2IrO4 is analogous to the high-Tc cuprate La2CuO4 both in crystal structure and in electronic state. In this study, we carried out the synthesis of high-quality samples, high-accurate measurements of transport and electronic properties of Ba2IrO4. We have revealed the peculiar electronic state of Ba2IrO4, and suggested the way to superconductivity.

Research Products

• [Journal Article] The electronic structure of the high- symmetry perovskite iridate Ba2IrO4 (2014)
  • Author(s): S. Moser, L. Moreschini, A. Ebrahimi, B. Dalla Piazza, M. Isobe, H. Okabe, J. Akimitsu, V. V. Mazurenko, K. S. Kim, A. Bostwick, E. Rotenberg, J. Chang, H. M. Rønnow, M. Grioni
  • Journal Title: New J. Phys. Volume: 16 Pages: 013008-1
  • DOI: 10.1088/1367-2630/16/1/013008
• [Journal Article] Orbital occupancies and the putative jeff = 1/2 ground state in Ba2IrO4 : A combined oxygen K-edge XAS and RIXS study (2014)
  • Author(s): M. Moretti Sala, M. Rossi, S. Boseggia, J. Akimitsu, N. B. Brookes, M. Isobe, M. Minola, H. Okabe, H. M. Rønnow, L. Simonelli, D. F. McMorrow, and G. Monaco
  • Journal Title: Phys. Rev. B Volume: 89 Pages: 121101(R)/1-5
  • DOI: 10.1103/PhysRevB.89.121101
• [Journal Article] Bulk nature of layered perovskite iridates beyond the Mott scenario : An approach from a bulk-sensitive photoemission study (2014)
  • Author(s): A. Yamasaki, S. Tachibana, H. Fujiwara, A. Higashiya, A. Irizawa, O. Kirilmaz, F. Pfaff, P. Scheiderer, J. Gabel, M. Sing, T. Muro, M. Yabashi, K. Tamasaku, H. Sato, H. Namatame, M. Taniguchi, A. Hloskovskyy, H. Yoshida, H. Okabe, M. Isobe, J. Akimitsu, W. Drube, R. Claessen, T. Ishikawa, S. Imada, A. Sekiyama, S. Suga
  • Journal Title: Phys. Rev. B Volume: 89 Pages: 121111(R)/1-5
  • DOI: 10.1103/PhysRevB.89.121111
• [Journal Article] Carrier doping effect for transport properties of a spin-orbit Mott insulator Ba2IrO4 (2013)
  • Author(s): H. Okabe, M. Isobe, E. Takayama- Muromachi, N. Takeshita, and J. Akimitsu
  • Journal Title: Phys. Rev. B Volume: 88 Pages: 075137/1-6
  • DOI: 10.1103/PhysRevB.88.075137
• [Journal Article] McMorrow, Robustness of basal-plane antiferromagnetic order and the Jeff = 1/2 state in single-layer iridate spin-orbit Mott insulators (2013)
  • Author(s): S. Boseggia, R. Springell, H. C. Walker, Ch. Rüegg, H. Okabe, M. Isobe, R. S. Perry, S. P. Collins, D. F. McMorrow
  • Journal Title: Phys. Rev. Lett. Volume: 110 Pages: 117207/1-5
  • DOI: 10.1103/PhysRevLett.110.117207
• [Journal Article] Pressure-induced Metal- insulator Transition of the Mott Insulator Ba2IrO4 (2013)
  • Author(s): D. Orii, M. Sakata, A. Miyake, K. Shimizu, H. Okabe, M. Isobe, E. Takayama-Muromachi, and J. Akimitsu
  • Journal Title: Journal of the Korean Physical Society Volume: 63 Pages: 349-351
  • DOI: 10.3938/jkps.63.349
• [Journal Article] Magnetic States in Quasi-2-D Iridium Oxides with Large Spin-orbit Coupling (2013)
  • Author(s): M. Isobe, H. Okabe, J. Akimitsu
  • Journal Title: Journal of the Korean Physical Society Volume: 63 Pages: 394-397
  • DOI: 10.3938/jkps.63.394
• [Journal Article] Magnetic ordering in spin-orbit Mott insulator Ba2IrO4 probed byμSR (2012)
  • Author(s): H Okabe, M Isobe, E Takayama- Muromachi, A Koda, S Takeshita, M Hiraishi, M Miyazaki, R Kadono, Y Miyake, and J Akimitsu
  • Journal Title: J. Phys. Conf. Ser. Volume: 400 Pages: 032071/1-4
  • DOI: 10.1088/1742-6596/400/3/032071
• [Journal Article] Spin-Orbit Mott State in the Novel Quasi-2D Antiferromagnet Ba2IrO4 (2012)
  • Author(s): M Isobe, H Okabe, E Takayama- Muromachi, A Koda, S Takeshita, M Hiraishi, M Miyazaki, R Kadono, Y Miyake, and J Akimitsu
  • Journal Title: J. Phys. Conf. Ser. Volume: 400 Pages: 032028/1-4
  • DOI: 10.1088/1742-6596/400/3/032028
• [Presentation] Doping effect on the Jeff = 1/2 Mott insulator Ba2IrO4 (2013)
  • Author(s): H. Okabe, M. Isobe, E. Muromachi, N. Takeshita, A. Koda, M. Hiraishi, Masatoshi, M. Miyazaki, R. Kadono, Y. Miyake, J. Akimitsu
  • Organizer: International Workshop on Novel Superconductors and Super Material
  • Place of Presentation: 品川グランドセントラルタワー
  • Year and Date: 20131121-22
• [Presentation] Sr2VO4の高圧下における金属化探索 (2013)
  • Author(s): 貝出直大,清水克哉,岡部博孝,磯部雅朗,秋光純
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 新潟コンベンションセンター
  • Year and Date: 20131114-16
• [Presentation] YbB2C2の単結晶育成と物性評価 (2013)
  • Author(s): 岡部博孝,吉田紘行,磯部雅朗,松下能孝,佐藤晃,室町英治,秋光純
  • Organizer: 日本物理学会2013年秋期大会
  • Place of Presentation: 徳島大学
  • Year and Date: 20130925-28
• [Presentation] μSR study of the magnetic state in layered iridates (2013)
  • Author(s): H. Okabe, M. Isobe, E. Muromachi, M. Miyazaki, R. Kadono, Y. Miyake, J. Akimitsu
  • Organizer: Light and Particle Beams in Materials Science
  • Place of Presentation: つくば国際会議場
  • Year and Date: 20130828-31
• [Presentation] スピン・軌道モット絶縁体Ba2IrO4の磁化率 (2013)
  • Author(s): 磯部雅朗,岡部博孝,室町英治,秋光純
  • Organizer: The Internal Conference on Strongly Correlated Electron Systems
  • Place of Presentation: 東京大学
  • Year and Date: 20130805-09
• [Presentation] Magnetic Properties of carrier-doped Ba2IrO4 probed byμSR (2013)
  • Author(s): H. Okabe, M. Isobe, E. Muromachi, A. Koda, M. Hiraishi, Masatoshi, M. Miyazaki, R. Kadono, Y. Miyake, J. Akimitsu
  • Organizer: The Internal Conference on Strongly Correlated Electron Systems
  • Place of Presentation: 東京大学
  • Year and Date: 20130805-09
• [Presentation] 高圧力下におけるBa2IrO4の電気伝導特性 (2013)
  • Author(s): 折井大祐,坂田雅文,三宅厚志,清水克哉,岡部博孝,磯部雅朗,室町英治,秋光純
  • Organizer: 日本物理学会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2013-09-20
• [Presentation] μSRで見たスピン軌道モット絶縁体Ba2IrO4のキャリアドーピング効果 (2013)
  • Author(s): 岡部博孝,磯部雅朗,室町英治,幸田章宏,平石雅俊,宮崎正範,門野良典,三宅康博,秋光純
  • Organizer: 日本物理学会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-28
• [Presentation] スピン軌道モット絶縁体Ba2IrO4の磁化率 (2013)
  • Author(s): 磯部雅朗,岡部博孝,室町英治,秋光純
  • Organizer: 日本物理学会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-28
• [Presentation] Ba2IrO4のラマン分光研究 (2013)
  • Author(s): 津田俊輔,岡部博孝,磯部雅朗,宇治進也
  • Organizer: 日本物理学会
  • Place of Presentation: 広島大学
  • Year and Date: 2013-03-28
• [Presentation] スピン軌道モット絶縁体Ba2IrO4におけるキャリアドーピング効果 (2012)
  • Author(s): 岡部博孝,磯部雅朗,室町英治,竹下直,秋光純
  • Organizer: 日本物理学会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-20