JART VCM v1b Readvar

The JART VCM v1b Readvar model represents a further extension of the JART VCM v1b var model which additionally considers read noise. The equivalent circuit diagram of the JART VCM v1b Readvar model can be seen in Fig. 1 (JART_VCM_v1b_Readvar.jpg) [1]. The read noise is implemented by adding a random jump of single oxygen vacancies to and from the disc region directly resulting in a jump of the theed resistance. Figure 2 (JART_VCM_v1b_Readvar_Fig2.jpg) shows a set of current traces of different devices measured at a read voltage of 0.35 V. As can be observed diferent devices can exhibit different jump frequencies. The current jump height is thereby a function of the average resistance with higher resistances resulting in higher jumps on average. The Verilog-A code of this model and user guide can be downloaded.