Superconductivity mechanism of molecular conductors through control of the dimerization and frustration
| Project/Area Number |
22540365
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Nagoya University |
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Principal Investigator |
ITO Hiroshi 名古屋大学, 工学研究科, 准教授 (10260374)
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| Co-Investigator(Kenkyū-buntansha) |
ONARI Seiichiro 名古屋大学, 大学院・工学研究科, 助教 (80402535)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 有機超伝導体 / 2量体化 / β型分子配列 / スピン揺らぎ / 三角格子 / フラストレーション / 一軸圧縮 / ２量体性 / 一軸性圧縮 |
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| Research Abstract |
We study experimentally and theoretically the shift of the superconducting transition temperature (T_C) under uniaxial compression in β-type organic superconductors possessing unidirectional molecular stacks. Contrary to the BDA-TTP salts, BEDT-TTF salts shows T_C maximum in both compressions parallel and perpendicular to the molecular stack. T_C calculations are carried out on both the dimerized and nondimerized Hubbard models. We have found that the competition between the spin frustration and the effect induced by the fluctuation causes the nonmonotonic shift of T_C and that the behavior of T_C in BEDT-TTF salts with a stronger dimerization is well reproduced by the dimer model, while that in weakly dimerized BDA-TTP salts is rather well reproduced by the nondimerized model.
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Report
(4 results)
Research Products
(34 results)
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[Presentation] β型有機超伝導体の-軸性圧縮効果-圧縮方向依存性-2011
Author(s)
伊東裕, 丹羽政文, 田中久暁, 黒田新一, 本杉友佳里, 鈴木丈夫, 大成誠一郎, 田仲由喜夫, 平松孝章, 矢持秀起, 齋藤軍治
Organizer
日本物理学会2011年秋季大会
Place of Presentation
富山大学(富山県)
Year and Date
2011-09-21
Related Report
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[Presentation] β型有機超伝導体の一軸性圧縮効果‐圧縮方向依存性‐2011
Author(s)
伊東裕,丹羽政文,田中久暁,黒田新一,本杉友佳里,鈴木丈夫,大成誠一郎,田仲由喜夫,平松孝章,矢持秀起,齋藤軍治
Organizer
日本物理学会2011年秋季大会
Place of Presentation
富山大学 (富山市)
Related Report
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