| Budget Amount *help |
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2018: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
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| Outline of Final Research Achievements |
We have proposed a new vertical spin transistor, where magnetic molecules are embedded as spin quantum dots in a double tunnel junction. First, a double tunnel junction with organic molecules was formed and the junction was employed as the channel layer in the vertical transistor. Single carrier tunneling reflecting molecular orbitals was found to be induced in the transistor. The drain current was effectively controlled by the gate voltage. Second, we have established the formation process of double tunnel junctions based on ferromagnetic electrodes. The induced tunneling current was modulated by the spin inversion in the ferromagnetic electrodes. Finally, we adopted organic radicals as spin quantum dots in the double tunnel junction. We observed the tunneling currents via the organic molecules and consequently achieved the observation of negative magnetoresistance.
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