Mn impurity band and the effects of Mn position in III-V lattice: Pivotal contributions of Władek Walukiewicz to the understanding of ferromagnetism in semiconductors

Jacek K. Furdyna, Xinyu Liu, Małgorzata Dobrowolska, Sanghoon Lee

Research output: Contribution to journalShort surveypeer-review

2 Citations (Scopus)

Abstract

This paper describes the contributions made by Władysław (Władek) Walukiewicz and his colleagues to the field of ferromagnetic semiconductor (FMS) alloys, such as (Ga,Mn)As. We focus on two key accomplishments. First, this team has predicted the formation of Mn interstitials in these materials, which have a profound effect on ferromagnetism in semiconductors. Additionally, identifying the conditions at which interstitials form has provided grounds for optimizing their ferromagnetic properties. Second, by applying the approach of band anticrossing to ferromagnetic semiconductors, this team has mapped out the properties of an Mn-derived impurity band in these materials. This is of particular importance in the field, because holes, which reside in the Mn-derived impurity band, are the very mechanism responsible for ferromagnetic order in FMSs. We discuss the effect that these accomplishments have on our understanding of FMSs and how they have contributed to progress in this area. We then describe the pathways that these achievements have opened up toward further progress in both basic and applied fronts of ferromagnetism in semiconducting systems; and we present our perspective on where additional work along the lines initiated by Władek Walukiewicz should be extended to further benefit this field.

Original languageEnglish
Article number200901
JournalJournal of Applied Physics
Volume134
Issue number20
DOIs
Publication statusPublished - 2023 Nov 28

Bibliographical note

Publisher Copyright:
© 2023 Author(s).

ASJC Scopus subject areas

  • General Physics and Astronomy

Fingerprint

Dive into the research topics of 'Mn impurity band and the effects of Mn position in III-V lattice: Pivotal contributions of Władek Walukiewicz to the understanding of ferromagnetism in semiconductors'. Together they form a unique fingerprint.

Cite this