2009 Fiscal Year Final Research Report
Study of spin liquid states under geometrical frustration
| Project/Area Number |
20840026
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| Research Category |
Grant-in-Aid for Young Scientists (Start-up)
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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 |
YAMASHITA Minoru Kyoto University, 理学研究科, 助教 (10464207)
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| Project Period (FY) |
2008 – 2009
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| Keywords | 磁性 / 低温物性 |
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| Research Abstract |
To explore the nature of spin excitations of spin liquid material, we have measured thermal conductivity of organic compounds κ-(BEDT-TTF)_2Cu_2(CN)_3 and EtMe_3Sb[Pd(dmit)_2]_2, which are known to possess no-long-range ordered stat-so called "spin liquid state"-down to the lowest temperature. We found the excitation of κ-(BEDT-TTF)_2Cu_2(CN)_3 is gapped, so it is a gapped spin liquid. On the other hand, thermal conductivity of EtMe_3Sb[Pd(dmit)_2]_2 shows a temperature dependence very similar to metal, even though the material is insulator.
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