Study for electronic state of pressure-indeced superconductivity in iron-based ladder-type material and search for related superconductors
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16H04019
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Nihon University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
山内 徹 東京大学, 物性研究所, 技術専門職員 (10422445)
大串 研也 東北大学, 理学研究科, 教授 (30455331)
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2018: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
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| Keywords | 梯子型鉄系化合物 / 圧力効果 / 超伝導 / 圧力誘起超伝導 / はしご型鉄化合物 / 高圧 / 鉄系超伝導 / 鉄系超伝導体 / 銅酸化物超伝導体 / 梯子型化合物 / 鉄化合物 / はしご形鉄化合物 / 新規超伝導 / 梯子型鉄化合物 |
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| Outline of Final Research Achievements |
We studied iron-based ladder-type materials showing pressure-induced superconductivity. The purpose is to elucidate the mechanism of such a novel superconductivity and to develop related superconductors. We found the pressure-induced metallization for the mixed crystal Ba1-xCsxFe2Se3. The end members BaFe2Se3 and CsFe2Se3 show block-type and stripe-type antiferromagnetism, respectively. Though superconductivity could not be found for Ba1-xCsxFe2Se3, resitance drop which may be related to superconductivity could be found for pristine single crystal of BaFe2Se3, which is successfully grown recently. For BaFe2Se3, metal-insulator transition was observed using both cubic anvil press and diamond anvil cell, but superconductivity was observed only in case for using diamond anvil cell. It is possible that the electronic properties under high pressure strongly depend on the quality of the pressure. We will study the relation between electrical properties and hydrostatic condition.
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| Academic Significance and Societal Importance of the Research Achievements |
これまでの鉄系超伝導体では、キャリアをドープする前の母相が半金属であるのに対し、はしご型鉄系超伝導体の母相はモット絶縁体である。また、鉄系超伝導体の超伝導対称性がs波的であったのに対し、はしご型鉄系超伝導体の超伝導対称性はd波的である事が理論的に予測されている。銅酸化物超伝導体が、モット絶縁体を母相とし、超伝導対称性がd波的であることを考えると、はしご型鉄系超伝導体の研究を進めることにより、鉄系超伝導体のみならず、銅酸化物も含めた、高温超伝導現象についての知見が得られる可能性があり、学術的に重要である。
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Report
(4 results)
Research Products
(72 results)
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[Journal Article] Orbital-anisotropic electronic structure in the nonmagnetic state of BaFe2(As1-xPx)2 superconductors2018
Author(s)
1.T. Sonobe, T. Shimojima, A. Nakamura, M. Nakajima, S.Uchida, K. Kihou, C.H. Lee, A. Iyo, H. Eisaki, K. Ohgushi, K. Ishizaka
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Journal Title
Sci. Rep.
Volume: 8
Issue: 1
Pages: 2169-2169
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Effect of Fe-site Substitution on Pressure-induced Spin Transition in SrFeO22017
Author(s)
Takateru Kawakami, Takafumi Yamamoto, Kanami Yata, Minoru Ishii, Yoshika, Murakawa, Nobukatsu Kazama, Yoshitaka Watanabe, Masaichiro Mizumaki, Naomi Kawamura, Naoki Ishimatsu, Hiroki Takahashi, Taku Okada, Takehiko Yagi, and Hiroshi Kageyama
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Journal Title
Journal of the Physical Society of Japan
Volume: 86
Issue: 12
Pages: 124716-124716
DOI
NAID
Related Report
Peer Reviewed / Open Access
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[Journal Article] Orbital order and fluctuations in the two-leg ladder materials BaFe 2 X 3 ( X = S and Se) and CsFe 2 Se 32017
Author(s)
Kou Takubo, Yuichi Yokoyama, Hiroki Wadati, Shun Iwasaki, Takashi Mizokawa, Teak Boyko, Ronny Sutarto, Feizhou He, Kazuki Hashizume, Satoshi Imaizumi, Takuya Aoyama, Yoshinori Imai, and Kenya Ohgushi
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Journal Title
Physical Review B
Volume: 96
Issue: 11
Pages: 115157-115157
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Presentation] 梯子型超伝導体AFe2X3(A=Ba,Cs,X=S,Se)の共鳴X線散乱2018
Author(s)
田久保耕, 横山優一, 山本航平, 平田靖透, 和達大樹, 岩崎駿, 溝川貴司, Teak Boyko, Ronny Sutarto, Feizoh He, 今泉聖司, 青山拓也, 橋詰和樹, 今井良宗, 大串研也
Organizer
日本物理学会第73回年次大会（2018年）（東京理科大学）
Related Report
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[Presentation] AFe2X3 (A=Ba, Cs, X=S, Se)の電子構造2017
Author(s)
田久保耕, 横山優一, 和達大樹, 溝川貴司, Teak BoykoC, Ronny Sutarto, Feizoh He, 青山拓也, 橋詰和樹, 大串研也
Organizer
日本物理学会 第72回年次大会(2017)
Place of Presentation
大阪大学（大阪府大阪市）
Year and Date
2017-03-18
Related Report
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[Presentation] 梯子型鉄系化合物 BaFe2Se3の単結晶に対する非弾性中性子散乱2017
Author(s)
羽合孝文, 南部雄亮, 大串研也, Barry Winn, V. Ovidiu Garlea, Melissa Graves-Brook, Igor Zaliznyak, 伊藤晋一, 横尾哲也, 佐藤卓
Organizer
日本物理学会 第72回年次大会(2017)
Place of Presentation
大阪大学（大阪府大阪市）
Year and Date
2017-03-17
Related Report
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[Presentation] AFe2X3(A=Ba,Cs,X=S,Se)の電子構造II2017
Author(s)
田久保耕, 和達大樹A, 溝川貴司, Teak Boyko, Ronny Sutarto, Feizoh He, 今泉聖司, 青山拓也, 橋詰和樹, 今井良宗, 大串研也
Organizer
日本物理学会2017年秋季大会（岩手大学）
Related Report
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[Presentation] 中性子とミュオンでみた鉄系梯子型物質BaFe2Se3の動的磁性2017
Author(s)
南部雄亮, 鈴木謙介, 羽合孝文, 長尾道弘, 横尾哲也, 伊藤晋一, 岡部博孝, 幸田章宏, 門野良典, 今泉聖司, 橋詰和樹, 青山拓也, 今井良宗, 大串研也
Organizer
日本物理学会2017年秋季大会（岩手大学）
Related Report
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[Presentation] 梯子格子系BaFe2S3の角度分解光電子分光2016
Author(s)
岩崎駿, 山本健登, 青山拓也, 橋詰和樹, 大串研也, 有田将司, 生天目博文, 谷口雅樹, N. L. SainiC, 溝川貴司
Organizer
日本物理学会 2016年秋季大会
Place of Presentation
金沢大学（石川県金沢市）
Year and Date
2016-09-15
Related Report
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[Presentation] Pressure-induced superconductivity in iron-based compound BaFe2S32016
Author(s)
H.Takahashi, C. Kawashima, H. Soeda, Y. Hirata, T. Hawai, Y. Nambu, T. J. Sato, K. Ohgushi
Organizer
The 17th International Conference on High Pressure in Semiconductor Physics & The Workshop on High Pressure Study on Superconducting
Place of Presentation
東京大学 山上会館（東京都文京区）
Year and Date
2016-08-07
Related Report
Int'l Joint Research / Invited
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