Dopant ordering and enhancement of superconducting transition temperature induced by co-doping of iron-based superconductors
Project/Area Number |
23740274
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Condensed matter physics II
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Research Institution | Okayama University |
Principal Investigator |
KUDO Kazutaka 岡山大学, 大学院・自然科学研究科, 助教 (40361175)
|
Project Period (FY) |
2011 – 2012
|
Project Status |
Completed (Fiscal Year 2012)
|
Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
|
Keywords | 高温超伝導 / 鉄系超伝導体 / 新物質開発 |
Research Abstract |
Iron-based superconductors consist of alternating two-dimensional Fe2As2layers and spacer layers. In order to realize higher transition temperature Tc, it is essential to seek novel spacer layers to optimize the electronic state in Fe2As2layer. The spacer layers reported so far consist of ionic chemical bonds. In this study, we discovered iron-based superconductors Ca10(PtnAs8)(Fe2-xPtxAs2)5(n = 3, 4) with PtnAs8spacer layers made of covalent chemical bonds. Tc= 17 K was observed in the beta phase (n = 3), in which Pt and vacancy are ordered in the spacer layer. By adjusting the amounts of Pt and vacancy, Tcwas raised up to 38 K in the alpha phase (n = 4). Our results demonstrated that a variety of spacer layers can be included in the iron-based superconductors.
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Report
(3 results)
Research Products
(53 results)
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[Journal Article] Orbital degeneracy and Peierls instability in the triangular-lattice superconductor Ir1-xPtxTe22012
Author(s)
Ootsuki, D Wakisaka, Y Pyon, S Kudo, K Nohara, M Arita, M Anzai, H Namatame, H Taniguchi, M Saini, NL Mizokawa, T
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Journal Title
PHYSICAL REVIEW B
Volume: 86
Issue: 1
Pages: 1-5
DOI
Related Report
Peer Reviewed
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[Journal Article] Two Pseudogaps with Different Energy Scales at the Antinode of the High-Temperature Bi2Sr2CuO6Superconductor Using Angle-Resolved Photoemission Spectroscopy2011
Author(s)
K. Nakayama, T. Sato, Y.-M. Xu, Z.-H.Pan, P. Richard, H. Ding, H.-H. Wen, K. Kudo, T. Sasaki, N. Kobayashi, and T. Takahashi
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Journal Title
Phys. Rev. B
Volume: vol. 83
Issue: 22
DOI
Related Report
Peer Reviewed
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