Long Range Magnetic order stabilized by acceptors

TL;DR

This paper demonstrates through first-principles calculations that acceptor doping in magnetic semiconductors like LiZnAs can induce and stabilize long-range magnetic order, offering new control mechanisms for spintronic applications.

Contribution

It reveals that acceptor doping can switch local magnetic order to long-range order, providing a novel method to control magnetic properties in semiconductors.

Findings

Acceptor doping suppresses local magnetic order.

Long-range magnetic order emerges in Mn and acceptor codoped LiZnAs.

The phenomenon is explained by interplay between acceptor-free and band coupling magnetism.

Abstract

Tuning magnetic order in magnetic semiconductors is a long sought goal. A proper concentration of acceptors can dramatically suppress local magnetic order in favor of the long one. Using Mn and an acceptor codoped LiZnAs as an example, we demonstrate, by first-principles calculation, the emergence of a long-range magnetic order. This intriguing phenomenon can be understood from an interplay between an acceptor-free magnetism and a band coupling magnetism. Our observation thus lays the ground for a precise control of the magnetic order in future spintronic devices.