| Project/Area Number |
19K15381
|
|---|
| Research Category |
Grant-in-Aid for Early-Career Scientists
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
Basic Section 28020:Nanostructural physics-related
|
|---|
| Research Institution | National Institutes for Quantum and Radiological Science and Technology (2020)
University of Tsukuba (2019) |
|---|
Principal Investigator |
Hashmi Arqum 国立研究開発法人量子科学技術研究開発機構, 関西光科学研究所 光量子科学研究部, 博士研究員(任常) (90815325)
|
|---|
| Project Period (FY) |
2019-04-01 – 2021-03-31
|
| Project Status |
Completed (Fiscal Year 2020)
|
| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
|
|---|
| Keywords | Magnetic 2D material / DFT / Spintronics / Valleytronics / Spin-valley hall / Spin-valley Hall / First principles / Spin filtering / Magnetic anisotropy / Spin-orbit coupling |
|---|
| Outline of Research at the Start |
The main theme of this project is the realization of intrinsic magnetic 2D materials. Computational modelling saves a lot of useless efforts, money and resources. DFT is a powerful tool to unravel the basic phenomena and helps to understand rich physics of spintronics and valleytonics due to spin-orbit coupling effect which are hard to explain by experimental techniques.
|
| Outline of Final Research Achievements |
First work is related to spin conductance of electrons in magnetic tunnel junctions. This study reveals the effect of various electrode materials on spin transport that can help to develop 2D materials based efficient spintronics devices. In another work, we used first-principles calculations to search and design new 2D magnetic material. It is demonstrated that the ferromagnetic transition metal oxide layer of Cr2O3 layer can exist at room temperature which can be ideal for next-generation spintronics applications. Regarding the work on valleytronics, I investigated the possibility of realizing quantum valley Hall effects (QVHE) in blistered structures. The geometric distortion in blisters induces magnetic state in otherwise paramagnetic graphene. This spin degree of freedom gives rise to spin-filtered QVH states, and the valley conductivity is quantized. This study provides a pathway to realize the spin-filtered and valley contrasting QVH effects in the absence of external fields.
|
| Academic Significance and Societal Importance of the Research Achievements |
It is scientifically important in material science to find promising 2D materials that are likely to exist. This research was based on the computational approaches of materials simulation to find and screen the most promising candidate materials to expedite the materials characterization.
|
