Robustness of the In-Plane Data Crossing for Molecular Field-Coupled Nanocomputing

Molecular Field-Coupled Nanocomputing (molFCN) offers several advantages compared to other beyond-CMOS technologies, such as the cut of the power dissipation, thanks to the absence of charge transport, and the possibility to work at room temperature. Several circuits have been investigated for molFCN, primarily analyzed from a behavioral standpoint. Also, researchers proposed a few solutions to cross two signals and analyzed them from a logical and ideal perspective. Crossing information is an essential and delicate operation since molFCN is an in-plane technology. Besides, previous works demonstrated the need to consider molecule physics to predict the behavior of a molFCN circuit. This work examines different implementations of the in-plane information crossing interconnection, considering the punctual molecule physics to predict the interconnection functioning. We tune the electrostatic feature of the involved molecules to determine the robustness of the cross-wire against static electrostatic variations, thus providing valuable information for the synthesis of ad-hoc molecules for molFCN

Ab initio Molecular Dynamics Simulations of Field-Coupled Nanocomputing Molecules

Molecular Field-Coupled Nanocomputing (FCN) represents one of the most promising solutions to overcome the issues introduced by CMOS scaling. It encodes the information in the molecule charge distribution and propagates it through electrostatic intermolecular interaction. The need for charge transport is overcome, hugely reducing power dissipation. At the current state-of-the-art, the analysis of molecular FCN is mostly based on quantum mechanics techniques, or ab initio evaluated transcharacteristics. In all the cases, studies mainly consider the position of charges/atoms to be fixed. In a realistic situation, the position of atoms, thus the geometry, is subjected to molecular vibrations. In this work, we analyse the impact of molecular vibrations on the charge distribution of the 1,4-diallyl butane. We employ Ab Initio Molecular Dynamics to provide qualitative and quantitative results which describe the effects of temperature and electric fields on molecule charge distribution, taking into account the effects of molecular vibrations. The molecules are studied at near-absolute zero, cryogenic and ambient temperature conditions, showing promising results which proceed towards the assessment of the molecular FCN technology as a possible candidate for future low-power digital electronics. From a modelling perspective, the diallyl butane demonstrates good robustness against molecular vibrations, further confirming the possibility to use static transcharacteristics to analyse molecular circuits

A Roadmap for Molecular Field-Coupled Nanocomputing Actualization

In molecular field-coupled nanocomputing, electrostatically-coupled molecules encode the logic information in their charge distribution, promising extremely low power consumption, room temperature operation, and THz frequency operations. Besides the impressive theoretical predictions and simulation confirmations, a working prototype must still be fabricated. This work discusses the most crucial aspects that hinder the fabrication of a working prototype and defines a roadmap to address and guide the procedure to fabricate a working proof of concept. Accurate physical simulations support each point of the roadmap

vlsi-nanocomputing/SCERPA: SCERPA v4.0.1

Self-Consistent ElectRostatic Potential Algorithm, a simulation tool for molecular Field-Coupled Nanocomputing technolog