Table 2 Calculated the elastic constants Cij, Young’s modulus Ys and Poisson’s ratio ν of β-phase MX2N4 monolayers.

From: First-principles prediction of high carrier mobility for β-phase MX2N4 (M = Mo, W; X = Si, Ge) monolayers

Structure

C11 (N/m)

C12 (N/m)

C66 (N/m)

Ys (N/m)

ν

MoSi2N4

555.02

158.05

198.49

510.01

0.285

MoGe2N4

447.31

144.47

151.42

400.65

0.323

WSi2N4

582.25

161.21

210.52

537.62

0.277

WGe2N4

470.68

147.05

161.82

424.74

0.312

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