Multidirectional Intrinsic Piezoelectricity of 2D Metal Chalcogen–Diphosphate ABP2X6 Monolayers
Source abstract
Abstract
Due to the simultaneously broken inversion symmetries along multiple directions, ABP2X6 (A = Cu or Ag, B = In or Bi, and X = S or Se) monolayers exhibit the coexistence of sizable piezoelectric coefficients d11, d21, and d31, under unidirectional in‐plane strains or stresses, as determined from first‐principles calculations. Remarkably, the AgBiP2S6 and AgBiP2Se6 monolayers possess d11 coefficients of 17.33 and 17.25 pm V−1, respectively; these are much higher than those of extensively studied 2D piezoelectric materials. Meanwhile, the out‐of‐plane d31 coefficient of AgBiP2Se6 is as high as 0.36 pm V−1. The ABP2X6 monolayers possessing unique multidirectional piezoelectricity pave novel avenues for the application of piezoelectric devices with multiple functions.
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Research context
OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute for Computational Materials Science School of Physics and Electronics International Joint Research Laboratory of New Energy Materials and Devices of Henan Province Henan University Kaifeng 475004 China
Department of Mechanical Engineering The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong 999077 China
Institute of High Energy Physics Chinese Academy of Sciences (CAS) Beijing 100049 China
Spallation Neutron Source Science Center Dongguan 523803 China
Funding
National Natural Science Foundation of China
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