Premium
Multidirectional Intrinsic Piezoelectricity of 2D Metal Chalcogen–Diphosphate ABP 2 X 6 Monolayers
Author(s) -
Jiang Shujuan,
Yin Huabing,
Li Jingyu,
Liu Lu,
Shi Xiaobo,
Yan Yuli,
Liu Chang,
Zheng Guang-Ping,
Liu Peng-Fei
Publication year - 2020
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.202000321
Subject(s) - piezoelectricity , monolayer , chalcogen , piezoelectric coefficient , condensed matter physics , materials science , metal , crystallography , nanotechnology , chemistry , physics , composite material , metallurgy
Due to the simultaneously broken inversion symmetries along multiple directions, ABP 2 X 6 (A = Cu or Ag, B = In or Bi, and X = S or Se) monolayers exhibit the coexistence of sizable piezoelectric coefficients d 11 , d 21 , and d 31 , under unidirectional in‐plane strains or stresses, as determined from first‐principles calculations. Remarkably, the AgBiP 2 S 6 and AgBiP 2 Se 6 monolayers possess d 11 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 d 31 coefficient of AgBiP 2 Se 6 is as high as 0.36 pm V −1 . The ABP 2 X 6 monolayers possessing unique multidirectional piezoelectricity pave novel avenues for the application of piezoelectric devices with multiple functions.