Overcoming thermal noise in non-volatile spin wave logic

TL;DR

This paper explores the potential of non-volatile spin wave logic devices to operate error-free despite thermal noise, by identifying suitable materials and demonstrating theoretical robustness for wave-based computation.

Contribution

It introduces a theoretical framework for achieving error-free, clocked non-volatile spin wave logic devices resilient to thermal noise and clock variability.

Findings

Identification of suitable materials for spin wave logic

Theoretical demonstration of noise robustness in device operation

Potential for error-free, energy-efficient wave-based computing

Abstract

Spin waves are propagating disturbances in magnetically ordered materials, analogous to lattice waves in solid systems and are often described from a quasiparticle point of view as magnons. The attractive advantages of Joule-heat-free transmission of information, utilization of the phase of the wave as an additional degree of freedom and lower footprint area compared to conventional charge-based devices have made spin waves or magnon spintronics a promising candidate for beyond-CMOS wave-based computation. However, any practical realization of an all-magnon based computing system must undergo the essential steps of a careful selection of materials and demonstrate robustness with respect to thermal noise or variability. Here, we aim at identifying suitable materials and theoretically demonstrate the possibility of achieving error-free clocked non-volatile spin wave logic device, even in the presence of thermal noise and clock jitter or clock skew.