c-axis charge dynamics in iron-based superconductors

• Project/Area Number: 26800187
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Osaka University
• Principal Investigator: NAKAJIMA Masamichi 大阪大学, 理学(系)研究科(研究院), 助教 (20724347)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 鉄系超伝導体 / 単結晶育成 / 光学スペクトル

Outline of Final Research Achievements

In order to extract the universal properties of FeAs layers in various iron-based superconductors, we have studied the three dimensional electronic structure using single crystals of Ba(Fe,Co)2As2 and Sr4V2O6Fe2As2. From the c-axis optical spectrum of overdoped Ba(Fe,Co)2As2, it is turned out that the semiconducting c-axis behavior in low-temperature resistivity does not arise from the charge-gap opening. We succeeded in growing almost millimeter-sized single crystals of Sr4V2O6Fe2As2 for the first time, and revealed that the physical properties is sensitive to the amount of oxygen deficiency.

Research Products

• [Journal Article] Effect of magnetism on lattice dynamics in SrFe2As2 using high-resolution inelastic x-ray scattering (2016)
  • Author(s): N. Murai, T. Fukuda, T. Kobayashi, M. Nakajima, H. Uchiyama, D. Ishikawa, S. Tsutsui, H. Nakamura, M. Machida, S. Miyasaka, S. Tajima, and A. Q. R. Baron
  • Journal Title: Physical Review B Volume: 93 Issue: 2 Pages: 020301-020301
  • DOI: 10.1103/physrevb.93.020301
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Single-Crystal Growth of Ba1－xKxFe2As2 by KAs Self-Flux Method (2016)
  • Author(s): K. Kihou, T. Saito, K. Fujita, S. Ishida, M. Nakajima, K. Horigane, H. Fukazawa, Y. Kohori, S. Uchida, J. Akimitsu, A. Iyo, C. H. Lee and H. Eisaki
  • Journal Title: J. Phys. Soc. Jpn Volume: 85 Issue: 3 Pages: 034718-034718
  • DOI: 10.7566/jpsj.85.034718
  • NAID: 210000133877
  • Peer Reviewed
• [Journal Article] In-plane electronic anisotropy in the antiferromagnetic-orthorhombic phase of isovalent-substituted Ba(Fe1－xRux)2As2 (2015)
  • Author(s): L. Liu, T. Mikami, S. Ishida, K. Koshiishi, K. Okazaki, T. Yoshida, H. Suzuki, M. Horio, L. C. C. Ambolode II, J. Xu, H. Kumigashira, K. Ono, M. Nakajima, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Kakeshita, S. Uchida, and A. Fujimori
  • Journal Title: Physical Review B Volume: 92 Issue: 9 Pages: 094503-094503
  • DOI: 10.1103/physrevb.92.094503
  • Peer Reviewed
• [Journal Article] Gap Structure Seen in Magnetic Penetration Depth and Flux-Flow Resistivity of 122 Fe-Based Su- perconductors (2015)
  • Author(s): A. Maeda, T. Okada, H. Takahashi, F. Nabeshima, Y. Imai, K. Kitagawa, K. Matsubayashi, Y. Uwatoko, M. Nakajima, A. Iyo, H. Eisaki
  • Journal Title: Quantum Matter Volume: 4 Issue: 4 Pages: 308-313
  • DOI: 10.1166/qm.2015.1197
  • Peer Reviewed
• [Journal Article] Electronic structure of BaNi2P2 observed by angle-resolved photoemission spectroscopy (2014)
  • Author(s): S. Ideta, T. Yoshida, M. Nakajima, W. Malaeb, H. Kito, H. Eisaki, A. Iyo, Y. Tomioka, T. Ito, K. Kihou, C. H. Lee, Y. Kotani, K. Ono, S. K. Mo, Z. Hussain, Z.-X. Shen, H. Harima, S. Uchida, and A. Fujimori
  • Journal Title: Phys. Rev. B Volume: 89 Issue: 19 Pages: 195138-195138
  • DOI: 10.1103/physrevb.89.195138
  • Peer Reviewed
• [Journal Article] Normal-state charge dynamics in doped BaFe2As2: Roles of doping and necessary ingredients for superconductivity (2014)
  • Author(s): M. Nakajima, S. Ishida, T. Tanaka, K. Kihou, Y. Tomioka, T. Saito, C. H. Lee, H. Fukazawa, Y. Kohori, T. Kakeshita, A. Iyo, T. Ito, H. Eisaki, and S. Uchida
  • Journal Title: Sci. Rep. Volume: 4 Issue: 1 Pages: 5873-5873
  • DOI: 10.1038/srep05873
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Strong electronic correlations in iron pnictides: Comparison of the optical spectra for BaFe2As2-related compounds (2014)
  • Author(s): M. Nakajima, S. Ishida, T. Tanaka, K. Kihou, Y. Tomioka, T.Saito, C. H. Lee, H. Fukazawa, Y. Kohori, T. Kakeshita, A. Iyo, T. Ito, H. Eisaki, and S. Uchida
  • Journal Title: J. Phys. Soc. Jpn. Volume: 83 Issue: 10 Pages: 104703-104703
  • DOI: 10.7566/jpsj.83.104703
  • NAID: 210000133303
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Vortex lattice structure in BaFe2(As0.67P0.33)2 by the small-angle neutron scattering technique (2014)
  • Author(s): R. Morisaki-Ishii, H. Kawano-Furukawa, A. S. Cameron, L. Lemberger, E. Blackburn, A. T. Holmes, E. M. Forgan, L. M. DeBeer-Schmitt, K. Littrell, M. Nakajima, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, S. Uchida, J. S. White, C. D. Dewhurst, J. L. Gavilano, and M. Zolliker
  • Journal Title: Phys. Rev. B Volume: 90 Issue: 12 Pages: 125116-125116
  • DOI: 10.1103/physrevb.90.125116
  • Peer Reviewed
• [Journal Article] Evidence of a universal relation between electron-mode coupling and Tc in Ba1－xKxFe2As2 superconductor from laser angle-resolved photoemission spectroscopy (2014)
  • Author(s): W. Malaeb, T. Shimojima, Y. Ishida, T. Kondo, K. Okazaki, Y. Ota, K. Ohgushi, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, S. Ishida, M. Nakajima, S. Uchida, H. Fukazawa, T. Saito, Y. Kohori, and S. Shin
  • Journal Title: Phys. Rev. B Volume: 90 Issue: 19 Pages: 195124-195124
  • DOI: 10.1103/physrevb.90.195124
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Anisotropy of the superconducting gap in the iron-based superconductor BaFe2(As1-xPx)2 (2014)
  • Author(s): T. Yoshida, S. Ideta, T. Shimojima, W. Malaeb, H. Suzuki, I. Nishi, A. Fujimori, S. Shin, et al.
  • Journal Title: Sci. Rep. Volume: 4 Issue: 1 Pages: 7292-7292
  • DOI: 10.1038/srep07292
  • Peer Reviewed / Open Access
• [Journal Article] Penetration depth and flux-flow resistivity measurements of BaFe2(As0.55P0.45)2 single crystals (2014)
  • Author(s): T. Okada, Y. Imai, H. Takahashi, M. Nakajima, A. Iyo, H. Eisaki, A. Maeda
  • Journal Title: Physica C Volume: 504 Pages: 24-27
  • DOI: 10.1016/j.physc.2014.03.025
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] SmFeAs(O,F)薄膜の赤外分光測定II (2015)
  • Author(s): 中島正道
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学千里山キャンパス
  • Year and Date: 2015-09-16
• [Presentation] SmFeAs(O,F)薄膜の赤外分光測定 (2014)
  • Author(s): 中島正道
  • Organizer: 日本物理学会2014年秋季大会
  • Place of Presentation: 中部大学春日井キャンパス
  • Year and Date: 2014-09-09
• [Presentation] 122相超伝導体に関する最新の話題と理解 (2014)
  • Author(s): 中島正道
  • Organizer: 未踏科学技術協会 超伝導科学技術研究会 第84回ワークショップ「新しい超伝導体のホットな話題、最新の理解」
  • Place of Presentation: 全日通霞が関ビルディング
  • Year and Date: 2014-07-22
  • Invited