Open AccessAn Oxygen Vacancy Memristor Ruled by Electron Correlations
Author(s) -
Humbert Vincent,
El Hage Ralph,
Krieger Guillaume,
SanchezSantolino Gabriel,
Sander Anke,
Collin Sophie,
Trastoy Juan,
Briatico Javier,
Santamaria Jacobo,
Preziosi Daniele,
Villegas Javier E.
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202201753
Subject(s) - neuromorphic engineering , memristor , condensed matter physics , resistive random access memory , electron , oxygen , thermal conduction , materials science , field (mathematics) , nanotechnology , electron transport chain , electric field , chemical physics , physics , computer science , chemistry , electrode , artificial neural network , quantum mechanics , mathematics , artificial intelligence , biochemistry , pure mathematics , composite material
Abstract Resistive switching effects offer new opportunities in the field of conventional memories as well as in the booming area of neuromorphic computing. Here the authors demonstrate memristive switching effects produced by a redox‐driven oxygen exchange in tunnel junctions based on NdNiO 3 , a strongly correlated electron system characterized by the presence of a metal‐to‐insulator transition (MIT). Strikingly, a strong interplay exists between the MIT and the redox mechanism, which on the one hand modifies the MIT itself, and on the other hand radically affects the tunnel resistance switching and the resistance states' lifetime. That results in a very unique temperature behavior and endows the junctions with multiple degrees of freedom. The obtained results bring up fundamental questions on the interplay between electronic correlations and the creation and mobility of oxygen vacancies in nickelates, opening a new avenue toward mimicking neuromorphic functions by exploiting the electric‐field control of correlated states.