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2D Janus Polarization Functioned by Mechanical Force
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DOI：10.1002/adma.202403929.png)
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Abstract
En 中文
2D polarization materials have emerged as promising candidates for meeting the demands of device miniaturization, attributed to their unique electronic configurations and transport characteristics. Although the existing inherent and sliding mechanisms are increasingly investigated in recent years, strategies for inducing 2D polarization with innovative mechanisms remain rare. This study introduces a novel 2D Janus state by modulating the puckered structure. Combining scanning probe microscopy, transmission electron microscopy, and density functional theory calculations, this work realizes force-triggered out-of-plane and in-plane dipoles with distorted smaller warping in GeSe. The Janus state is preserved after removing the external mechanical perturbation, which could be switched by modulating the sliding direction. This work offers a versatile method to break the space inversion symmetry in a 2D system to trigger polarization in the atomic scale, which may open an innovative insight into configuring novel 2D polarization materials. 2D polarization materials are promising for miniaturized devices due to their unique properties. However, strategies for creating 2D polarization through new mechanisms are rare. This work introduces a 2D Janus structure with both vertical and planar polarization, achieved by applying force with a nanoprobe. This technique breaks symmetry at the atomic level, inducing polarization and paving the way for new 2D polarization materials' development and design. image
Keywords:
2D janus
2D materials
mechanical force
polarization
Journal
IF:
26.8
Papers:
3.4W
Citations:
46.0W