| Autor: |
Zhang, Shuchen, Jin, Linrui, Lu, Yuan, Zhang, Linghai, Yang, Jiaqi, Zhao, Qiuchen, Sun, Dewei, Thompson, Joshua J. P., Yuan, Biao, Ma, Ke, Akriti, Park, Jee Yung, Lee, Yoon Ho, Wei, Zitang, Finkenauer, Blake P., Blach, Daria D., Kumar, Sarath, Peng, Hailin, Mannodi-Kanakkithodi, Arun, Yu, Yi, Malic, Ermin, Lu, Gang, Dou, Letian, Huang, Libai |
| Rok vydání: |
2023 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| Popis: |
Moir\'e superlattices have emerged as a new platform for studying strongly correlated quantum phenomena, but these systems have been largely limited to van der Waals layer two-dimensional (2D) materials. Here we introduce moir\'e superlattices leveraging ultra-thin, ligand-free halide perovskites, facilitated by ionic interactions. Square moir\'e superlattices with varying periodic lengths are clearly visualized through high-resolution transmission electron microscopy. Twist-angle-dependent transient photoluminescence microscopy and electrical characterizations indicate the emergence of localized bright excitons and trapped charge carriers near a twist angle of ~10{\deg}. The localized excitons are accompanied by enhanced exciton emission, attributed to an increased oscillator strength by a theoretically forecasted flat band. This work illustrates the potential of extended ionic interaction in realizing moir\'e physics at room temperature, broadening the horizon for future investigations. |
| Databáze: |
arXiv |
| Externí odkaz: |
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