Fig. 4: Understanding the prestress-induced nonlinearity. | Nature Communications

Fig. 4: Understanding the prestress-induced nonlinearity.

From: Large internal stress induced nonlinear current-voltage behavior in nanodiamond strengthened ZnO ceramics

Fig. 4

a FEM simulated internal stress-induced polarization in ND/ZnO composites; the arrows indicate the polarization vectors of grains. b Band structures of a potential barrier for head-to-head configuration under (i) compressive and (ii) tensile stress; the internal stress-induced polarization changes the potential barrier height as well as the negative interfacial charge density (Qi). FEM Simulated the distribution of current density in monolith (c) and composites with different sintering pressures (NZ-100 (d) and NZ-150 (e)) under the same voltage.

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