تقرير
Evidence for Two-dimensional Weyl Fermions in Air-Stable Monolayer PtTe$_{1.75}$
| العنوان: | Evidence for Two-dimensional Weyl Fermions in Air-Stable Monolayer PtTe$_{1.75}$ |
|---|---|
| المؤلفون: | Cai, Zhihao, Cao, Haijun, Sheng, Haohao, Hu, Xuegao, Sun, Zhenyu, Zhao, Qiaoxiao, Gao, Jisong, Ideta, Shin-ichiro, Shimada, Kenya, Huang, Jiawei, Cheng, Peng, Chen, Lan, Yao, Yugui, Meng, Sheng, Wu, Kehui, Wang, Zhijun, Feng, Baojie |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science |
| الوصف: | The Weyl semimetals represent a distinct category of topological materials wherein the low-energy excitations appear as the long-sought Weyl fermions. Exotic transport and optical properties are expected because of the chiral anomaly and linear energy-momentum dispersion. While three-dimensional Weyl semimetals have been successfully realized, the quest for their two-dimensional (2D) counterparts is ongoing. Here, we report the realization of 2D Weyl fermions in monolayer PtTe$_{1.75}$, which has strong spin-orbit coupling and lacks inversion symmetry, by combined angle-resolved photoemission spectroscopy, scanning tunneling microscopy, second harmonic generation, X-ray photoelectron spectroscopy measurements, and first-principles calculations. The giant Rashba splitting and band inversion lead to the emergence of three pairs of critical Weyl cones. Moreover, monolayer PtTe$_{1.75}$ exhibits excellent chemical stability in ambient conditions, which is critical for future device applications. The discovery of 2D Weyl fermions in monolayer PtTe$_{1.75}$ opens up new possibilities for designing and fabricating novel spintronic devices. Comment: Nano Letters, In Press |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2407.20606 |
| رقم الأكسشن: | edsarx.2407.20606 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |