2010 Fiscal Year Final Research Report
Studies on novel ground states and the mechanism of pressure-induced superconductivities in organic triangular-lattice Mott insulators
| Project/Area Number |
21740255
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | Kyoto University |
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Principal Investigator |
ITOU Tetsuaki Kyoto University, 大学院・人間・環境学研究科, 助教 (50402748)
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| Project Period (FY) |
2009 – 2010
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| Keywords | 有機導体 / スピン液体 / スピンギャップ / 超伝導 |
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| Research Abstract |
Theorists have considered that exotic magnetism and superconductivity are possibly realized in triangular-lattice systems. I have experimentally revealed that organic triangular-lattice X[Pd(dmit)_2]_2 systems shows these exotic states. The system X=(C_2H_5)(CH_3)_3Sb was found to show a quantum spin-liquid state. I also found that the ground state of this quantum spin liquid has exotic hidden order unforeseen by classical physics. I revealed that the system X=(C_2H_5)(CH_3)_3P shows exotic superconductivity which is different from the usual d_<x2-y2> superconductivity mediated by (π, π) antiferromagnetic fluctuations.
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