| Project/Area Number |
16H03865
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Thin film/Surface and interfacial physical properties
|
|---|
| Research Institution | Kobe University (2019, 2021)
University of Tsukuba (2016-2018) |
|---|
Principal Investigator |
Ono Tomoya 神戸大学, 工学研究科, 教授 (80335372)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
植本 光治 神戸大学, 工学研究科, 助教 (90748500)
|
|---|
| Project Period (FY) |
2016-04-01 – 2020-03-31
|
| Project Status |
Completed (Fiscal Year 2021)
|
| Budget Amount *help |
¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2018: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2016: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
|
|---|
| Keywords | 第一原理計算 / 伝導特性 / スピントロニクス / 界面物性 / 表面界面物性 / 輸送特性 / スピン / デバイス界面 |
|---|
| Outline of Final Research Achievements |
The large-scale first-principles spin-transport calculation method based on the real-space finite-difference method and the code RSPACE have been developed. We performed spin-transport simulations using RSPACE. In the development of the code, by combining the Green's functions of scattering region, which are calculated in divided subspaces, the transport simulation for the carbon nanotube consisting more than 190,000 atoms has been achieved. This simulation employs one of the largest models among the first-principles transport-property calculation. In addition, using RSPACE, we have investigated the spin-polarized transport property in graphene based magnetic tunnel junctions and found that the graphene plays an important role for spin-transport property.
|
| Academic Significance and Societal Importance of the Research Achievements |
これからの情報化社会では高性能情報処理デバイスが必要であり、次世代デバイスの開発は喫緊の課題である。デバイスはナノサイズに微細化されており、デバイスの高性能化にはデバイス中を流れる電子の挙動を理解し制御する必要がある。量子力学に基づく計算法は電子の動きを正確に予測できるものの膨大な計算が必要である。本課題は、スーパーコンピュータを用いて膨大な計算を処理する計算手法・コードを開発し、その有用性を示したものである。
|
