Table 3.

The ideal strengths (f), critical strains (${\epsilon }_c$), Young’s modulus and Poisson’s ratios of monolayer β-CSe under the three strain styles.

Direction	f (N/m)	${\mathit{\epsilon }}_{\mathit{c}}$	Young’s Modulus (N/m)	Poisson’s Ratio
Armchair	5.6	0.10	86.14	0.14
Zigzag	5.90	0.14	83.47	0.16
Biaxial	6.4	0.13	99.15	0.09