Study of Electron Correlation Effect in Half-metallic Ferromagnets
| Project/Area Number |
24540343
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | International Christian University |
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Principal Investigator |
HIRASHIMA Dai 国際基督教大学, 教養学部, 教授 (20208820)
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| Co-Investigator(Kenkyū-buntansha) |
MUTOU Tetsuya 島根大学, 総合理工学研究科, 准教授 (50312244)
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| Project Period (FY) |
2012-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | Half-metallic ferro. / Electron correlation / Depolarization / Surface state / Flat band / ハーフメタル強磁性 / 遍歴磁性 / 電子相関 / 界面状態 / 遍歴強磁性 / 保存型近似 / スピン波 / 金属強磁性 / ハーフメタル |
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| Outline of Final Research Achievements |
Electron correlation effect on half-metallic ferromagnetic compounds is clarified using perturbational methods. In particular, the self-consistent T-matrix theory is applied to NiMnSb, which is a typical half-metallic compound, and it is found that the depolarization around the Fermi surface is mainly caused by the chemical potential shift. In addition, the mechanism of generation of peculiar edge/surface states such as the ones found on a zigzag edge of graphene is discussed and many examples where this kind of peculiar edge/surface states are generated are found.
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Report
(5 results)
Research Products
(15 results)
