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. 2015 Sep 8;5:13753. doi: 10.1038/srep13753

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Time dependence of the LRS (data points) compared to the HRS (blue dashed line) for the Nb_xO_y/Au Schottky contact of Fig. 2(a) (gray data points) and the double barrier device (black data points). For the readout of the resistance state read pulses of 0.5 V every 60 s were applied. Red lines are data fits used to extrapolate retention times. Inset: retention characteristic for the double barrier device within the first 500s.