P-type polymer-based Ag₂S atomic switch for “tug of war” operation

Abstract

The Ag2S gap-type atomic switch based “tug of war” device is a promising element for building a new type of CMOS free neuromorphic computer-hardware. Since Ag+ cations are reduced during operation of the device, it was thought that the gap-material should be a n-type polymer. In this study, we revealed that the polymer bithiophene–oligoethyleneoxide (BTOE) doped poly(ethylene oxide) (PEO), which was used as gap-material in the first demonstration of the “tug of war”, is a p-type polymer. For this we used impedance spectroscopy and transistor measurements. We elaborate on how the electrochemical processes in the “tug of war” devices could be explained in the case of p-type conductive gap-materials.

Quantized conductance behaviour observed in an atomic switch using triptycene-based polymers

“…Although many polymer materials have been studied for resistive switching applications, [12][13][14][15][16][17] there are some interesting polymers whose properties are yet to be understood for better performance. Triptycene-based polymers come under this category.…”

Time‐Dependent Operations in Molecular Gap Atomic Switches

“…At the same time, it should be dense enough for avoiding a short‐circuit when forming a top electrode on it. Discussion in more detail can be found elsewhere …”

Nanoarchitectonics Intelligence with atomic switch and neuromorphic network system

“…The An atomic switch-based decision-maker model previously proposed 175) was experimentally demonstrated by Lutz, Hasegawa and co-workers by using Ag 2+δ S gap-type atomic switches. 177,178) Figure 27(A) shows an illustration of the atomic switch consisting of Ag 2+δ S electrode and Pt counter electrodes for a tug-of-war operation. 178) Ag filament grown in the gap between an α-Ag 2+δ S electrode and a Pt counter electrode of an atomic switch can be viewed as equivalent to a pseudopod-like branch of amoeba.…”

“…177,178) Figure 27(A) shows an illustration of the atomic switch consisting of Ag 2+δ S electrode and Pt counter electrodes for a tug-of-war operation. 178) Ag filament grown in the gap between an α-Ag 2+δ S electrode and a Pt counter electrode of an atomic switch can be viewed as equivalent to a pseudopod-like branch of amoeba. Thus, the current for each Ag 2+δ S electrode can be used to make a decision.…”