| Project/Area Number |
15K13274
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nanostructural physics
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| Research Institution | Osaka University |
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Principal Investigator |
Oiwa Akira 大阪大学, 産業科学研究所, 教授 (10321902)
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| Co-Investigator(Kenkyū-buntansha) |
赤羽 浩一 国立研究開発法人情報通信研究機構, ネットワークシステム研究所ネットワーク基盤研究室, 主任研究員 (50359072)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | InSb量子井戸 / 分子線エピタキシー / マヨラナ粒子 / 量子ポイントコンタクト / メゾスコピック系 / MBE / 量子細線 / 半導体微細化 / 低温物性 / マヨラナフェルミオン / 超伝導接合 |
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| Outline of Final Research Achievements |
Majorana fermions have become one of the fascinating subjects in solid state physics because of their non-Abelian statistics and application to quantum computation. In this project, we aim at exploring the Majorana fermions by fabricating a one-dimensional wire using a high-quality InSb quantum well, which has a strong spin-orbit interaction, grown by molecular beam epitaxy. By growing a thick buffer layer of AlSb/AlInSb on a GaAs substrate, the density of threading dislocations near the surface can be significantly reduced. We could observed a two-dimensional electron-like behavior at low temperature under applied magnetic fields though the mobility was low. We have also almost established the fabrication process of a quantum point contact with side-gates. The strategy for improving the mobility has been clarified. We have established the crucial technologies to realize the high quality InSb one-dimensional wire for searching Majorana fermions.
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