title: Stochastic switching of TiO2-based memristive devices with identical initial memory states.
abstract: In this work, we show that identical TiO2-based memristive devices that possess the same initial resistive states are only phenomenologically similar as their internal structures may vary significantly, which could render quite dissimilar switching dynamics. We experimentally demonstrated that the resistive switching of practical devices with similar initial states could occur at different programming stimuli cycles. We argue that similar memory states can be transcribed via numerous distinct active core states through the dissimilar reduced TiO2-x filamentary distributions. Our hypothesis was finally verified via simulated results of the memory state evolution, by taking into account dissimilar initial filamentary distribution.
authors.affiliation: College of Electronics Science and Engineering, National University of Defense Technology, Changsha 410073, China ; Southampton Nanofabrication Centre, Nano Group, Department of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, UK.
authors.forename: Qingjiang
authors.initials: Q
authors.lastname: Li
authors.affiliation: Southampton Nanofabrication Centre, Nano Group, Department of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, UK.
authors.forename: Ali
authors.initials: A
authors.lastname: Khiat
authors.affiliation: Southampton Nanofabrication Centre, Nano Group, Department of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, UK.
authors.forename: Iulia
authors.initials: I
authors.lastname: Salaoru
authors.affiliation: College of Electronics Science and Engineering, National University of Defense Technology, Changsha 410073, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Xu
authors.affiliation: Southampton Nanofabrication Centre, Nano Group, Department of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, UK.
authors.forename: Themistoklis
authors.initials: T
authors.lastname: Prodromakis
keywords: Filamentary distribution; Initial state; Resistive switching