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Updated: Jan 16, 2026

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
Published on: October 12, 2019
Prediction by density functional theory of auxetic behaviour in hydroxyl-terminated Mo2B2MBenes
Di Zhao1, Mengqing Hu1, Ming Zhou1
1School of Environment and Science, Griffith University, Gold Coast Campus, Southport 4222, Australia.
Abstract:
Auxetic materials exhibit unique properties, such as enhanced energy absorption and increased shear stiffness, making them beneficial for various applications. In this study, we employ first-principles calculations to investigate the structural, mechanical, and electronic properties of pristine and terminated Mo2B2MBenes. Our findings reveal that some hexagonal Mo2B2(OH)2configurations present a remarkable negative Poisson's ratio, indicating auxetic behaviour. This mechanical response is attributed to its unique bridging coordination of hydroxyl groups. The analysis of their structural and electronic properties establishes a clear correlation between termination type, bond characteristics, and the resulting mechanical properties. Our theoretical results, therefore, provide valuable insights for the design of novel 2D auxetic materials.
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