Multidirectional Intrinsic Piezoelectricity of 2D Metal Chalcogen–Diphosphate ABP2X6 Monolayers

Shujuan Jiang, Huabing Yin, Jingyu Li, Lu Liu, Xiaobo Shi, Yuli Yan, Chang Liu, Guang Ping Zheng, Peng Fei Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)


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.

Original languageEnglish
Article number2000321
JournalPhysica Status Solidi - Rapid Research Letters
Issue number10
Publication statusPublished - 1 Oct 2020


  • 2D materials
  • multidirectional piezoelectricity
  • out-of-plane polarization

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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