Development of high density quantum wire by interfacial dislocation array
Project/Area Number |
26420662
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Physical properties of metals/Metal-base materials
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Research Institution | The University of Tokyo |
Principal Investigator |
Saito Mitsuhiro 東京大学, 大学院工学系研究科(工学部), 客員共同研究員 (00510546)
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Project Period (FY) |
2014-04-01 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
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Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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Keywords | 転位 / 粒界 / 界面 / 電子顕微鏡 / 量子細線 / 酸化マグネシウム / 第一原理計算 / STEM / 結晶界面 |
Outline of Final Research Achievements |
We succeeded to form quantum wires with quantum properties embedded in a solid oxide crystal. In this work, MgO bicrystal symmetrical tilt GBs were used as model system. The bicrystals were fabricated by joining two MgO single crystal blocks (including residual impurities) under high temperature. Analyses of microstructure near the GBs revealed specific periodical structures. The atomic-resolution EELS elemental mapping revealed impurities segregation only at a coincidence site lattice (CSL) boundary which shows good lattice matching. The CSL GB showed that the Ca atoms are localized at the GB mirror plane, but Ti atoms exist at the neighboring sites (layer) of Ca sites. The detailed analysis and the theoretical calculation also revealed that co-existence and interaction of Ca and Ti atoms near the MgO GB with specific bonding angle might provide conductive Ti channels. By using dislocation technology, a quantum wire with quantum properties can be self-organized.
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Report
(4 results)
Research Products
(8 results)
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[Presentation] 対称傾角粒界の分解則について2015
Author(s)
井上和俊, 斎藤光浩, 王中長, 小谷元子, 幾原雄一
Organizer
日本金属学会2015年秋季講演大会
Place of Presentation
福岡県福岡市 九州大学伊都キャンパス
Year and Date
2015-09-16
Related Report
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