2019 Fiscal Year Research-status Report
Two Dimensional Magnetic Material: Spintronics & Valleytronics Applications
| Project/Area Number |
19K15381
|
|---|
| Research Institution | University of Tsukuba |
|---|
Principal Investigator |
Hashmi Arqum 筑波大学, 計算科学研究センター, 研究員 (90815325)
|
|---|
| Project Period (FY) |
2019-04-01 – 2021-03-31
|
| Keywords | Magnetic 2D material / First principles / Spintronics / Spin filtering / Magnetic anisotropy |
|---|
| Outline of Annual Research Achievements |
1-Regarding spintonics in Graphene, we investigated the spin dependent transport properties of magnetic tunnel junctions. Gr based junctions display higher transmission spectra indicating low contact resistance irrespective of the electrode material. Both symmetric and non-symmetric junctions exhibit distinctive selection rules due to the incompatibility of wave functions of electrodes on both sides of the interface.
2-In spite of new 2D materials, a key challenge is the generation of 100% spin-polarized current at the Fermi level for practical spintronics applications. In this work, we use first-principles calculations to demonstrate that the monolayer of chromium oxide, Cr2O3 has long-range ferromagnetism with large magnetocrystalline anisotropy energy and high Curie temperature.
|
| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
I have calculated the spin polarization in Graphene based junctions.
I have also found a new 2D material Cr2O3 which is a intrinsic half-metal that accomplishes perfect spin-filtering.
Both above mentioned works shows spin polarization, which is the first part of our project but are failed to show the Spin valley coupled Hall Effect.
|
| Strategy for Future Research Activity |
Regarding the work as Spin valley Hall Effect, i am investigating the atomic scale blisters due to dislocations or grain boundaries in the graphene lattice. Using First principles calculations i am exploring the various functionalities depending on the local symmetry and size of blisters.
This work shows the positive signs regarding our main focus of Spin valley Hall Effect.
|
| Causes of Carryover |
Because the research is not completed yet, 2nd year is most critical so i have to purchase and use most of the money in 2nd year.
I have to buy most of things like buying PC, software, equipments, and publication charge with incurring amount to be used in next fiscal year.
|
