| Autor: |
Xu, Yuanji, Jin, Xintao, Xiang, Jiacheng, Zhang, Huiyuan, Tian, Fuyang |
| Rok vydání: |
2024 |
| Předmět: |
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| Druh dokumentu: |
Working Paper |
| Popis: |
Finding and designing ferromagnets that operate above room temperature is crucial in advancing high-performance spintronic devices. The pioneering van der Waals (vdW) ferromagnet Fe$_3$GaTe$_2$ has extended the way for spintronic applications by achieving a record-high Curie temperature among its analogues. However, the physical mechanism of increasing Cuire temperature still needs to be explored. Here, we propose a practical approach to discovering high-temperature ferromagnetic materials for spintronic applications through flat band engineering. We simulate the magnetic transition directly from strongly correlated calculations, reconciling the dual nature of $d$-electrons with both localization and itinerant characters. Significantly, our systematic studies unveil the emergence of quasi-particle flat bands arising from collective many-body excitations preceding the ferromagnetic phase transition, reinforcing magnetic stability through a positive feedback mechanism. This research provides a promising pathway for exploring next-generation spintronic devices utilizing low-dimensional vdW flat band systems. |
| Databáze: |
arXiv |
| Externí odkaz: |
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