Resonant tunneling diode with spin polarized injector

TL;DR

This paper studies how a magnetic field influences the current-voltage behavior of a spin-polarized resonant tunneling diode, revealing significant changes in resonance characteristics due to Zeeman splitting.

Contribution

It introduces a model explaining the impact of giant Zeeman splitting on transport properties in a magnetic semiconductor resonant-tunneling diode.

Findings

Peak amplitude increases with magnetic field

Resonance shifts to higher voltages under magnetic influence

Model attributes effects to Zeeman splitting and resonance broadening

Abstract

We investigate the current-voltage characteristics of a II-VI semiconductor resonant-tunneling diode coupled to a diluted magnetic semiconductor injector. As a result of an external magnetic field, a giant Zeeman splitting develops in the injector, which modifies the band structure of the device, strongly affecting the transport properties. We find a large increase in peak amplitude accompanied by a shift of the resonance to higher voltages with increasing fields. We discuss a model which shows that the effect arises from a combination of three-dimensional incident distribution, giant Zeeman spin splitting and broad resonance linewidth.