Spin half-adder

TL;DR

This paper proposes a novel spin half-adder design using circular current-induced magnetic fields in a nano-junction, enabling atomic-scale spin-based computation and storage.

Contribution

It introduces a new spin half-adder architecture leveraging circular currents and magnetic fields in mesoscopic rings, a novel approach in nano-electronic spin logic devices.

Findings

The circular current induces a magnetic field used to control spin states.

The design allows for atomic-scale spin-based logic operations.

Potential experimental realization of the proposed model.

Abstract

A new proposal is given to design a spin half-adder in a nano-junction. It is well known that at finite voltage a net circulating current (known as circular current) appears within a mesoscopic ring under asymmetric ring-to-electrode interface configuration. This circular current induces a finite magnetic field at the center of the ring. We utilize this phenomenon to construct a spin half adder. The circular current induced magnetic field is used to regulate the alignments of local free spins, by their orientations we specify the output states of the `sum' and `carry'. All the outputs are spin based, therefore the results get atomically stored in the system. We also illustrate the experimental possibilities of our proposed model.