The Quantum Anomalous Hall Majorana Platform

TL;DR

This paper demonstrates that magnetic topological insulator thin films in a quantum anomalous Hall state can host stable quantum wires for Majorana particles, enabling potential quantum computing applications.

Contribution

It introduces a method to create and manipulate Majorana particles on MTI surfaces using gate-defined quantum wires in the QAH state.

Findings

Broad stability regions for topological states in MTI/superconductor wires

Feasibility of creating Majorana particles on MTI surfaces

Enhanced control over topological phases

Abstract

We show that quasi-one-dimensional (1D) quantum wires can be written onto the surface of magnetic topological insulator (MTI) thin films by gate arrays. When the MTI is in a quantum anomalous Hall (QAH) state, MTI$/$superconductor quantum wires have especially broad stability regions for both topological and non-topological states, facilitating creation and manipulation of Majorana particles on the MTI surface.