Volatile resistive-switched state in a bulk organic conductor with a sharp metal-insulator transition

Abstract

Volatile resistive switching in correlated-electron systems, characterized by an abrupt resistance decrease under applied current, is crucial for developing next-generation electronics. Despite its technological significance, the underlying physics remains elusive. Inorganic thin films on substrates---the widely studied platform for resistive switching---usually exhibit broad temperature-induced metal-insulator transitions (MITs) and substantial heat dissipation. These factors complicate the nonlinear thermal effect induced by Joule heating, a key contributor to resistive switching, rendering it excessively complex and difficult to decipher. Here we investigate a resistive-switched state in the bulk organic conductor ($d$7-DMe-DCNQI)${}_2$Cu, which undergoes an extremely sharp first-order MIT and exhibits weak heat dissipation, using resistance and ${}^1$H-NMR measurements. These extreme conditions make the Joule heating effect vivid, allowing us to observe peculiar phenomena, including temperature locking to the MIT and `inverse Ohm's law'---an inverse proportionality between voltage and current. These findings provide fundamental insights into the nonlinear thermal effect in resistive switching, offering a pathway to efficient resistive-switching technologies.

12 pages, 9 figures + 2 supplemental figures; published in Physical Review Applied

References in corpus (9)

• Training and Operation of an Integrated Neuromorphic Network Based on Metal-Oxide Memristors
• Biological plausibility and stochasticity in scalable VO2 active memristor neurons
• Photoferroelectric oxides
• Challenges in materials and devices for Resistive-Switching-based Neuromorphic Computing
• Non-Thermal Resistive Switching in Mott Insulators
• Fast Spiking of a Mott VO2-Carbon Nanotube Composite Device
• Silicon waveguide modulator with embedded phase change material
• Resistive switching in reverse: voltage driven formation of a transverse insulating barrier
• Direct observation of the electrically triggered Insulator-Metal transition in V3O5 far below the transition temperature