Multifunctional Spin Logic Gates In Graphene Spin Circuits

TL;DR

This paper demonstrates a reprogrammable all-electrical spin logic gate using graphene and nanomagnets, capable of performing multiple Boolean operations at room temperature, advancing spin-based computing technologies.

Contribution

It introduces a reconfigurable multifunctional spin logic gate with graphene buses, enabling scalable all-electric spin logic and neuromorphic computing applications.

Findings

Successfully demonstrated reprogrammable spin logic gate at room temperature

Achieved multiple Boolean operations (XOR, AND, OR) through magnetization control

Developed a physics-based spin circuit model to explain device mechanisms

Abstract

All-spin-based computing combining logic and nonvolatile magnetic memory is promising for emerging information technologies. However, the realization of a universal spin logic operation representing a reconfigurable building block with all-electrical spin current communication has so far remained challenging. Here, we experimentally demonstrate a reprogrammable all-electrical multifunctional spin logic gate in a nanoelectronic device architecture utilizing graphene buses for spin communication and multiplexing and nanomagnets for writing and reading information at room temperature. This gate realizes a multistate majority spin logic operation (sMAJ), which is reconfigured to achieve XNOR, (N)AND, and (N)OR Boolean operations depending on the magnetization of inputs. Physics-based spin circuit model is developed to understand the underlying mechanisms of the multifunctional spin logic gate and its operations. These demonstrations provide a platform for scalable all-electric spin logic and neuromorphic computing in the all-spin domain logic-in-memory architecture.