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Poisson’s ratio in layered two-dimensional crystals

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Title
Poisson’s ratio in layered two-dimensional crystals
Author(s)
Sungjong Woo; Hee Chul Park; Young-Woo Son
Publication Date
2016-02
Journal
PHYSICAL REVIEW B, v.93, no.7, pp.075420 -
Publisher
AMER PHYSICAL SOC
Abstract
We present first-principles calculations of elastic properties of multilayered two-dimensional crystals, such as graphene, h-BN, and 2H-MoS2, which show that their Poisson’s ratios along the out-of-plane direction are negative, near zero, and positive, respectively, spanning all possibilities for the sign of the ratios. While the in-plane Poisson’s ratios are all positive regardless of their disparate electronic and structural properties, the characteristic interlayer interactions as well as layer stacking structures are shown to determine the sign of their out-of-plane ratios. A thorough investigation of elastic properties as a function of the number of layers for each system is also provided, highlighting their intertwined nature between elastic and electronic properties. ©2016 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/2420
DOI
10.1103/PhysRevB.93.075420
ISSN
2469-9950
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
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