Physics-Based Models for Magneto-Electric Spin-Orbit Logic Circuits

TL;DR

This paper develops physics-based models for magneto-electric spin-orbit (MESO) devices, enabling accurate simulation of their multi-physics dynamics and demonstrating their potential for logic circuit applications.

Contribution

It introduces comprehensive 4x4 matrix models for spin-orbit coupling and a rigorous ferroelectric switching model based on LLG and LK equations for MESO devices.

Findings

Simulation confirms feasibility of MESO logic circuits

Models enable accurate multi-physics device simulation

Demonstrates operation of buffers, oscillators, and gates

Abstract

Spintronic devices are a promising beyond-CMOS device option thanks to their energy efficiency and compatibility with CMOS. To accurately capture their multi-physics dynamics, a rigorous treatment of both spin and charge and their inter-conversion is required. Here we present physics-based device models based on 4x4 matrices for the spin-orbit coupling part of the magneto-electric spin-orbit (MESO) device. Also, a more rigorous physics model of ferroelectric and magnetoelectric switching of ferromagnets, based on Landau-Lifshitz-Gilbert (LLG) and Landau-Khalatnikov (LK) equations, is presented. With the combined model implemented in a SPICE circuit simulator environment, simulation results were obtained which show feasibility of MESO implementation and functional operation of buffers, oscillators, and majority gates.