2014 Fiscal Year Research-status Report
Topological Transitions in Spin Transport in Nanostructures
| Project/Area Number |
26390014
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| Research Institution | The Institute of Physical and Chemical Research |
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Principal Investigator |
サーリコスキ ヘンリー 独立行政法人理化学研究所, 創発物性科学研究センター, 研究員 (50722245)
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| Co-Investigator(Kenkyū-buntansha) |
多々良 源 独立行政法人理化学研究所, 創発物性科学研究センター, チームリーダー (10271529)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | spintronics / interferometer / topological / spin / spin-orbit / transition / quantum |
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| Outline of Annual Research Achievements |
Topological transitions in spin interferometers was successfully studied during this year in collaboration with University of Seville group (prof. Diego Frustaglia, prof. Jose-Pablo Baltanas and Mr. Kike Vasquez) and experimental group at Tohoku University lead by prof. Junsaku Nitta. The results show theoretically that topological transitions are possible to achieve in spin interferometers and they display a characteristic displacement of interference pattern in conductance. The results have been written in a manuscript which is submitted to Physical Review Letters (under review) and can be accessed in the arXiv server (arXiv:1412.5487). In addition to this work follow-up works have been started which focus on classical systems and systems with non-conventional polygonal geometry. Initial results show interesting effects which warrant further studies in this fields.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
Collaboration with the overseas group at University of Seville has gone very smoothly and created a lot of synergy in this project. The findings have been more surprising than initially was thought and have a broad impact in other physical systems. Collaboration with the experimental group at Tohoku University has created opportunities to test the theoretical predictions in experimental systems.
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| Strategy for Future Research Activity |
The new Hokusai supercomputer system at RIKEN has recently started initial operations phase. There are plans to use this system to study more complicated system than was studied so far, such as polygonal interferometers with multi-mode transport channels and disorder. These studies are expected to deepen the knowledge achieved in the previous fiscal year.
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| Causes of Carryover |
A small amount of the grant was left over from the previous year.
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| Expenditure Plan for Carryover Budget |
The leftover amount will be used on equipment.
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| Remarks |
Preprint in arXiv (under review in Phys. Rev. Lett.)
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Research Products
(7 results)
