English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Active memristor elements, also called neuristors, are self-oscillatingdevices that are very good approximations to biological neuronal functionalityand are crucial to the development of low-power neuromorphic hardware.Materials that show conduction mechanisms that depend superlinearly withtemperature can lead to negative differential resistance (NDR) regimes, whichmay further be engineered as self-oscillators. Thermal runaway, insulator tometal phase transitions (IMT) can lead to such superlinearity and are beingextensively studied in systems such as TaO$_x$, NbO$_x$ and VO$_2$. However,ReNiO$_3$ systems that offer large tunability in metal-insulator transitiontemperatures are less explored so far. Here we demonstrate all-or-nothingneuron-like self-oscillations at MHz frequency and low temperatures on thinfilms of NdNiO$_3$, a model charge transfer insulator, and their frequencycoding behavior. We study the temperature dependence of NDR and show that itvanishes even at temperatures below the IMT temperature. We also show that thethreshold voltages scale with device size and that a simple electrothermaldevice model captures all these salient features. In contrast to existingmodels, our model correctly predicts the independence of oscillation amplitudewith the applied voltage, offering crucial insights about the nature of fixedpoints in the NDR region, and the dynamics of non-linear oscillations aboutthem. KEYWORDS: NDR, oscillations, thermal model.

Dynamics of Voltage Driven Self-Sustained Oscillations in NdNiO$_3$ Neuristors