Role of nonlinearity in resistive switching phenomena of lanthanum calcium manganate heterostructures

TL;DR

This paper investigates how nonlinear resistivity related to oxygen vacancies affects resistive switching in complex oxides, finding that nonlinearity improves switching endurance.

Contribution

It introduces a model linking nonlinear resistivity-concentration dependence to resistive switching and endurance in lanthanum calcium manganate heterostructures.

Findings

Nonlinearity enhances switching endurance.

The model uses the continuity equation for oxygen vacancies.

Resistive switching behavior is influenced by nonlinear resistivity-concentration relationship.

Abstract

The present paper examines the influence of a nonlinear relationship between the local oxygen-vacancy concentration and the local resistivity on resistive switching effects in complex oxides. The continuity equation has been used as a model for the motion of oxygen vacancies when a periodic time-dependent electrical current is applied. The question of endurance of the switching cycles is discussed. It is found that nonlinearity of the resistivity-concentration dependence enhances the endurance.