Table 1 Materials with eij > 10 × 10−10 C m−1.

From: Data-driven discovery of high performance layered van der Waals piezoelectric NbOI2

Material

ij

eij (10−10 C m−1)

dij (pm V−1)

Cij (N m−1)

TFFOM  (nN)

NbOI2

11

31.6

42.2

75.6

71.7

NbOBr2

11

26.4

30.0

89.0

63.2

NbOCl2

11

25.1

27.4

92.9

59.6

MoBr2O2

22

16.6

100.1

33.8

39.3

GeSe

22

12.3

122.2

18.2

6.0

SbAsO3

11

10.6

48.7

22.3

18.4

CuInP2Se6

22

10.1

62.3

44.5

3.1

  1. eij is the piezoelectric stress tensor element, dij, is the piezoelectric strain tensor element, Cij, is the elastic tensor element, and TFFOM is the figure of merit for thin film piezoelectric devices.27 Our computed in-plane dielectric constant of NbOX2 is 12–15 (see Supplementary Table S6).
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