朗道量子化
物理
量子霍尔效应
磁场
量化(信号处理)
凝聚态物理
石墨烯
电子
量子
领域(数学)
量子力学
计算机视觉
数学
计算机科学
纯数学
作者
Xinhua Wen,Chunyin Qiu,Yajuan Qi,Li-Ping Ye,Manzhu Ke,Fan Zhang,Zhengyou Liu
出处
期刊:Nature Physics
[Springer Nature]
日期:2019-03-04
卷期号:15 (4): 352-356
被引量:67
标识
DOI:10.1038/s41567-019-0446-3
摘要
Many intriguing phenomena occur for electrons under strong magnetic fields. Recently, it was proposed that an appropriate strain texture in graphene can induce a synthetic gauge field, in which the electrons behave like in a real magnetic field. This opened the door to control quantum transport by mechanical means and to explore unprecedented physics in high-field regime. Such studies have been achieved in molecular and photonic lattices. Here we report the first experimental realization of giant uniform pseudomagnetic field in acoustics by introducing a simple uniaxial deformation to acoustic graphene. Benefited from the controllability of our macroscopic platform, we observe the acoustic Landau levels in frequency-resolved spectroscopy and their spatial localization in pressure-field distributions. We further visualize the quantum-Hall-like edge states (connected to the zeroth Landau level), which have been elusive before owing to the challenge in creating large-area uniform pseudomagnetic fields. These results, highly consistent with our full-wave simulations, establish a complete framework for artificial structures under constant pseudomagnetic fields. Our findings, conceptually novel in acoustics, may offer new opportunities to manipulate sound.
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