تقرير
Observation of dislocation-induced topological modes in a three-dimensional acoustic topological insulator
| العنوان: | Observation of dislocation-induced topological modes in a three-dimensional acoustic topological insulator |
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| المؤلفون: | Xue, Haoran, Jia, Ding, Ge, Yong, Guan, Yi-jun, Wang, Qiang, Yuan, Shou-qi, Sun, Hong-xiang, Chong, Y. D., Zhang, Baile |
| المصدر: | Phys. Rev. Lett. 127, 214301 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Applied Physics |
| الوصف: | The interplay between real-space topological lattice defects and the reciprocal-space topology of energy bands can give rise to novel phenomena, such as one-dimensional topological modes bound to screw dislocations in three-dimensional topological insulators. We obtain direct experimental observations of dislocation-induced helical modes in an acoustic analog of a weak three-dimensional topological insulator. The spatial distribution of the helical modes is found through spin-resolved field mapping, and verified numerically by tight-binding and finite-element calculations. These one-dimensional helical channels can serve as robust waveguides in three-dimensional media. Our experiment paves the way to studying novel physical modes and functionalities enabled by topological lattice defects in three-dimensional classical topological materials. Comment: 6 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.127.214301 |
| URL الوصول: | http://arxiv.org/abs/2104.13161 |
| رقم الأكسشن: | edsarx.2104.13161 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.127.214301 |
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