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Zero Poisson's ratio in single-layer arsenic.
Lingling Bai1, Yifan Gao1, Junhao Peng1
1School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China. hfdong@gdut.edu.cn.
Nanoscale
|January 6, 2022
Summary
Researchers discovered a new two-dimensional material, P2/m arsenene, exhibiting a near-zero Poisson's ratio (ZPR). This novel ZPR material has exceptional stability, making it ideal for precision instruments and optoelectronics.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Zero (or near-zero) Poisson's ratio (ZPR) materials are crucial for precision instruments due to their strain stability.
- The scarcity of ZPR materials limits their widespread application.
- Developing novel ZPR materials is essential for technological advancements.
Purpose of the Study:
- To report the discovery of a novel two-dimensional ZPR material.
- To characterize the Poisson's ratio and electronic properties of this new material.
- To explore its potential applications in precision instruments and optoelectronics.
Main Methods:
- First-principles calculations were employed to investigate the material's properties.
- The Poisson's ratio was calculated for P2/m arsenene under strain along the zigzag direction.
- Band-gap analysis was performed to determine its optoelectronic suitability.
Main Results:
- A new two-dimensional material, P2/m arsenene, was identified with a near-zero Poisson's ratio of -0.00021.
- This Poisson's ratio is significantly lower than previously known ZPR crystalline materials.
- The material exhibits a tunable band-gap (1.420-2.154 eV) under strain, suitable for optoelectronic devices.
Conclusions:
- P2/m arsenene represents a novel and highly effective ZPR material.
- Its unique properties offer significant potential for applications in aviation, medicine, and flexible electronics.
- The material's optoelectronic characteristics make it promising for infrared and visible light devices.
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