| Project/Area Number |
22840036
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| Research Category |
Grant-in-Aid for Research Activity 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 | Tokyo Metropolitan University |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2011: ¥1,495,000 (Direct Cost: ¥1,150,000、Indirect Cost: ¥345,000)
Fiscal Year 2010: ¥1,625,000 (Direct Cost: ¥1,250,000、Indirect Cost: ¥375,000)
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| Keywords | 三角格子 / カイラリティ / 幾何学的フラストレート磁性 / 単結晶育成 / 中性子散乱 / 低温X線散乱 / PdCrO2 / PdCoO2 / PdCrO_2 / PdCoO_2 |
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| Research Abstract |
We have studied the spin and electronic structures of the triangular-lattice(TL) antiferromagnet PdCrO_2, in order clarify the role of spin chiralities for the Hall effect of TL magnetic systems. Using high quality single crystals, we revealed by neutron scattering experiments that PdCrO_2 has a non-coplanar spin structure which gives rise to finite spin chiralities in a local site. The angle-dependent magneto resistance shows the periodic enhancement of the electrical resistivity with a metal-nonmetal crossover, interplayed with the two-dimensional electronic structure. The results suggest the possibility that the spin chirality plays a crucial role for anomalous transport properties of this material.
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