| Budget Amount *help |
¥19,370,000 (Direct Cost: ¥14,900,000、Indirect Cost: ¥4,470,000)
Fiscal Year 2012: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2011: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2010: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000)
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| Research Abstract |
We detected inverse spin Hall effect of 5d transition-metal oxide IrO_2. Its spin Hall resistivity, defined as conversion efficiency from spin current to voltage, is about as ten times as the value of Pt, indicating that spin-orbit interaction is dominant in transport properties of 5d transition-metal oxides. The result demonstrates that these oxides are promising materials as a spin-current detector. We also found that artificial superlattices consisting of SrIrO_3 and SrTiO_3 belong to a novel type of a Mott insulator. We clarified that cooperation between electron correlation and spin-orbit interaction is affected by controlled dimensionality.
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