Experiments on noise assisted resistive switching

A. A. GARCÍA; G. A. PATTERSON; P. I. FIERENS; D. F. GROSZ

CABA

Workshop; EPICO 2012 - At the Frontiers of Condensed Matter VI; 2012

Recently, Stotland and Di Ventra [2] presented simulations, based on a model of resistive switching by Strukov et al. [1], which take into account the interaction of internal (inherent to the sample) noise with the nonlinearity of the device. They showed that there is an optimal noise intensity for which the contrast between high and low resistance values is maximized. They also suggested that externally applied noise should have a similar effect. In this work, we present experimental results on the effect of external noise on a sample of La0.325 Pr0.3 Ca0.375 MnO3. We first studied the behavior of the sample resistance under the application of short ( 1 ms) noiseless current pulses and found that only large amplitude pulses (> 500 mA) produced a significant resistance change. We then added Gaussian noise to the current pulses. In this case we found that noisy pulses with a small mean current amplitude induced similar resistance changes as those observed for much larger noiseless pulses.