Constructing Spin Interference Devices from Nanometric Rings

TL;DR

This paper explores the design of nanometric ring-based spin interference devices, demonstrating how molecular rings can function as spin filters and splitters using the Aharonov-Bohm effect, with calculations supporting their operation.

Contribution

It introduces methods to construct and analyze spintronic devices from molecular nanorings, incorporating both single-electron and many-body Coulomb blockade models.

Findings

Demonstrated spin filter and splitter functionalities from nanometric rings.

Provided analytical tools for designing nanometric interferometric spin devices.

Validated device operation using both single-electron and many-body models.

Abstract

The study of nanospintronic devices utilizing coherent transport through molecular scale multiply-connected geometries in the presence of moderate magnetic fields is presented. It is shown how two types of simple devices, spin filters and spin splitters (or Stern-Gerlach devices) may be constructed from molecular nanometric rings utilizing the Aharonov-Bohm effect. The current is calculated within a single electron approximation and within a many-body master equation approach where charging effects are accounted for in the Coulomb Blockade regime. We provide rules and tools to develop and analyze efficient spintronic devices based on nanometric interferometers.