Figure 2 : Poisson’s ratios.

From: Negative Poisson’s ratio in 1T-type crystalline two-dimensional transition metal dichalcogenides

Figure 2

(a) Poisson’s ratio, νab=−ɛb/ɛa, calculated for a 5% strain applied along the a axis (that is, ɛa=5%). (b,c) Poisson’s ratios for ZrS2 and MoS2 as a function of strain applied along the a axis (b) and b axis (c).