Self-sustained magnetoelectric oscillations in magnetic resonant tunneling structures

TL;DR

This paper theoretically demonstrates that ferromagnetic quantum wells can produce self-sustained high-frequency current oscillations due to carrier-mediated magnetic order, suggesting new quantum device applications.

Contribution

It introduces a theoretical model showing intrinsic oscillations in ferromagnetic resonant tunneling structures driven by magnetic interactions.

Findings

High-frequency current oscillations are induced by magnetic order.

Oscillations are robust and sustainable over a range of bias voltages.

Potential for new quantum electronic device applications.

Abstract

The dynamic interplay of transport, electrostatic, and magnetic effects in the resonant tunneling through ferromagnetic quantum wells is theoretically investigated. It is shown that the carrier-mediated magnetic order in the ferromagnetic region not only induces, but also takes part in intrinsic, robust, and sustainable high-frequency current oscillations over a large window of nominally steady bias voltages. This phenomenon could spawn a new class of quantum electronic devices based on ferromagnetic semiconductors.