Controlling high-frequency collective electron dynamics via single-particle complexity

TL;DR

This paper explores how external magnetic fields influence high-frequency electron oscillations in superlattices by inducing complex single-electron dynamics that control collective charge behavior.

Contribution

It reveals how magnetically-induced resonances in single-electron trajectories can enhance and tune collective high-frequency current oscillations in superlattices.

Findings

Enhanced high-frequency current oscillations observed

Resonant transitions between electron trajectories identified

External fields can control collective electron behavior

Abstract

We demonstrate, through experiment and theory, enhanced high-frequency current oscillations due to magnetically-induced conduction resonances in superlattices. Strong increase in the ac power originates from complex single-electron dynamics, characterized by abrupt resonant transitions between unbound and localized trajectories, which trigger and shape propagating charge domains. Our data demonstrate that external fields can tune the collective behavior of quantum particles by imprinting configurable patterns in the single-particle classical phase space.