Unique Omnidirectional Negative Poisson’s Ratio in δ-Phase Carbon Monochalcogenides
KAUST DepartmentComputational Physics and Materials Science (CPMS)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/667382
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AbstractAuxetic materials (negative Poisson’s ratio) are of exceptional importance for nanomechanical applications. Using first-principles calculations, we propose two-dimensional δ-phase carbon monochalcogenides (δ-CS, δ-CSe, and δ-CTe) with very strong auxeticity. In contrast to the known two-dimensional materials, we find that Poisson’s ratio is negative in all crystal directions. In addition, the δ-phase carbon monochalcogenides turn out to be direct or quasi-direct bandgap semiconductors with impressive absorption of solar radiation.
CitationSun, M., & Schwingenschlögl, U. (2021). Unique Omnidirectional Negative Poisson’s Ratio in δ-Phase Carbon Monochalcogenides. The Journal of Physical Chemistry C. doi:10.1021/acs.jpcc.0c11555
SponsorsThe research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
PublisherAmerican Chemical Society (ACS)
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