A thorough investigation of the switching dynamics of TiN/Ti/10 nm-HfO2/W resistive memories

The switching dynamics of TiN/Ti/HfO2/W-based resistive memories is investigated. The analysis consisted in the systematic application of voltage sweeps with different ramp rates and temperatures. The obtained results give clear insight into the role played by transient and thermal effects on the device operation. Both kinetic Monte Carlo simulations and a compact modeling approach based on the Dynamic Memdiode Model are considered in this work with the aim of assessing, in terms of their respective scopes, the nature of the physical processes that characterize the formation and rupture of the filamentary conducting channel spanning the oxide film. As a result of this study, a better understanding of the different facets of the resistive switching dynamics is achieved. It is shown that the temperature and, mainly, the applied electric field, control the switching mechanism of our devices. The Dynamic Memdiode Model, being a behavioral analytic approach, is shown to be particularly suitable for reproducing the conduction characteristics of our devices using a single set of parameters for the different operation regimesFEDER program [PID2022-139586NB-C41, PID2022- 139586NB-C42PID2022-139586NB-C43PID2022-139586NB-C44]The Consejería de Conocimiento, Investigaci´on y UniversidadJunta de Andalucía (Spain) [B-TIC-624-UGR20]Spanish Consejo Superior de Investigaciones Científicas (CSIC) [20225AT012]FEDER fundsRamón y Cajal grant number RYC2020-030150-IEuropean project MEMQuD, code 20FUN06EMPIR programme co-financed by the Participating StatesEuropean Union’s Horizon 2020 research and innovation programm

TiN/Ti/HfO2/TiN memristive devices for neuromorphic computing: from synaptic plasticity to stochastic resonance

The Supplementary Material for this article can be found online at: https://www.frontiersin.org/articles/10.3389/fnins.2023. 1271956/full#supplementary-materialFunding The author(s) declare that financial support was received for the research, authorship, and/or publication of this article. The authors thank the support of the Consejeria de Conocimiento, Investigacion y Universidad, Junta de Andalucia (Spain), and the FEDER program through project B-TIC-624-UGR20. They also thank the support of the Federal Ministry of Education and Research of Germany under Grant 16ME0092.We characterize TiN/Ti/HfO2/TiN memristive devices for neuromorphic computing. We analyze different features that allow the devices to mimic biological synapses and present the models to reproduce analytically some of the data measured. In particular, we have measured the spike timing dependent plasticity behavior in our devices and later on we have modeled it. The spike timing dependent plasticity model was implemented as the learning rule of a spiking neural network that was trained to recognize the MNIST dataset. Variability is implemented and its influence on the network recognition accuracy is considered accounting for the number of neurons in the network and the number of training epochs. Finally, stochastic resonance is studied as another synaptic feature. It is shown that this effect is important and greatly depends on the noise statistical characteristics.Consejería de Conocimiento, Investigación y Universidad, Junta de Andalucía (Spain), and the FEDER program through project B-TIC-624-UGR20Federal Ministry of Education and Research of Germany under Grant 16ME009

3D simulation of conductive nanofilaments in multilayer h-BN memristors via a circuit breaker approach

Project PID2022-139586NB-44 funded by MCIN/AEI/10.13039/501100011033European Union NextGenerationEU/PRTRProject PP2022.PP-13 funded by “Ayudas del Plan Propio UGR 2022”King Abdullah University of Science and Technolog

Guía de Terapéutica Antimicrobiana del Área Aljarafe, 3ª edición

Coordinadora: Rocío Fernández Urrusuno. Co-coordinadora: Carmen Serrano Martino.YesEstas guías son un recurso indispensable en los Programas de Optimización de Antibióticos (PROA). No sólo constituyen una herramienta de ayuda para la toma de decisiones en los principales síndromes infecciosos, proporcionando recomendaciones para el abordaje empírico de dichos procesos, sino que son el patrón/estándar de referencia que permitirá determinar la calidad o adecuación de los tratamientos realizados. Las guías pueden ser utilizadas, además, como herramienta de base para la formación y actualización en antibioterapia, ya que permiten mantener actualizados los conocimientos sobre las nuevas evidencias en el abordaje de las infecciones. Por último, deberían incorporar herramientas que faciliten el proceso de toma de decisiones compartidas con el paciente. El objetivo de esta guía es proporcionar recomendaciones para el abordaje de las enfermedades infecciosas más prevalentes en la comunidad, basadas en las últimas evidencias disponibles y los datos de resistencias de los principales patógenos que contribuyan a mejorar la calidad de la prescripción de antimicrobianos