Selective spin transport through a quantum heterostructure: Transfer matrix method

TL;DR

This paper investigates a one-dimensional quantum heterostructure as a spin filter using transfer matrix method, demonstrating its potential for selective spin transport at the nanoscale.

Contribution

It introduces a simple tight-binding model and numerical transfer matrix calculations to analyze spin-dependent transmission in magnetic heterostructures.

Findings

Demonstrates spin filtering capability over a range of bias voltages

Provides numerical analysis of spin-dependent transmission probabilities

Highlights potential for nanoscale spintronic devices

Abstract

In the present work we propose that a one-dimensional quantum heterostructure composed of magnetic and non-magnetic atomic sites can be utilized as a spin filter for a wide range of applied bias voltage. A simple tight-binding framework is given to describe the conducting junction where the heterostructure is coupled to two semi-infinite one-dimensional non-magnetic electrodes. Based on transfer matrix method all the calculations are performed numerically which describe two-terminal spin dependent transmission probability along with junction current through the wire. Our detailed analysis may provide fundamental aspects of selective spin transport phenomena in one-dimensional heterostructures at nano-scale level.