Hexagonal Boron Nitride Memristors With Nickel Electrodes: Current Conduction Mechanisms & Resistive Switching Behavior (RWTH Aachen)

A new technical paper titled “Resistive Switching and Current Conduction Mechanisms in Hexagonal Boron Nitride Threshold Memristors with Nickel Electrodes” was published by researchers at RWTH Aachen University and Peter Gruenberg Institute.

Abstract:

“The 2D insulating material hexagonal boron nitride (h-BN) has attracted much attention as the active medium in memristive devices due to its favorable physical properties, among others, a wide bandgap that enables a large switching window. Metal filament formation is frequently suggested for h-BN devices as the resistive switching (RS) mechanism, usually supported by highly specialized methods like conductive atomic force microscopy (C-AFM) or transmission electron microscopy (TEM). Here, the switching of multilayer hexagonal boron nitride (h-BN) threshold memristors with two nickel (Ni) electrodes is investigated through their current conduction mechanisms. Both the high and the low resistance states are analyzed through temperature-dependent current–voltage measurements. The formation and retraction of nickel filaments along boron defects in the h-BN film as the resistive switching mechanism is proposed. The electrical data are corroborated with TEM analyses to establish temperature-dependent current–voltage measurements as a valuable tool for the analysis of resistive switching phenomena in memristors made of 2D materials. The memristors exhibit a wide and tunable current operation range and low stand-by currents, in line with the state of the art in h-BN-based threshold switches, a low cycle-to-cycle variability of 5%, and a large On/Off ratio of 10⁷.”

Find the technical paper here. Published May 2023.

Völkel, L., Braun, D., Belete, M., Kataria, S., Wahlbrink, T., Ran, K., Kistermann, K., Mayer, J., Menzel, S., Daus, A., Lemme, M. C., Resistive Switching and Current Conduction Mechanisms in Hexagonal Boron Nitride Threshold Memristors with Nickel Electrodes. Adv. Funct. Mater. 2023, 2300428. https://doi.org/10.1002/adfm.202300428.