Dilute Magnetic Impurity-induced Effective Phonon Magnetic Moment in Fe-Doped Monolayer MoS2

Authors

Hussam Mustafa, Auburn University
Gaihua Ye, Edward E. Whitacre Jr. College of Engineering
Cynthia Nnokwe, Edward E. Whitacre Jr. College of Engineering
Mengqi Fang, Charles V. Schaefer, Jr. School of Engineering and Science
Mohamed Kandil, Auburn University
Abdullah Al-Mahboob, Brookhaven National Laboratory
Kai Wu, Edward E. Whitacre Jr. College of Engineering
Andrew James Stollenwerk, University of Northern Iowa
Timothy E. Kidd, University of Northern Iowa
Paul M. Shand, University of Northern Iowa
Jerzy T. Sadowski, Brookhaven National Laboratory
Eui Hyeok Yang, Charles V. Schaefer, Jr. School of Engineering and Science
Yinong Zhou, Auburn University
Rui He, Texas Tech University
Wencan Jin, Auburn University

Comments

First published in 2D Materials, v12 n4 published by IOP Publishing Ltd. DOI: https://doi.org/10.1088/2053-1583/ae04fc

Document Type

Article

Publication Version

Published Version

Keywords

circularly polarized phonon, dilute magnetic semiconductor, Fe-doped MoS2, helicity-resolved magneto-Raman spectroscopy, orbital-phonon coupling, phonon magnetic moments

Journal/Book/Conference Title

2d Materials

Volume

12

Issue

4

First Page

1

Last Page

8

Abstract

Realization of large effective phonon magnetic moment in monolayer MoS2 has established an important route for exploring intriguing magnetic phenomena in a nonmagnetic material. The sizable coupling between the orbital transition and the circularly polarized phonon results in the large effective phonon magnetic moment. In this work, using magneto-Raman spectroscopy, we investigate substitutional doping of magnetic atoms as a tuning knob of the electronic and phononic properties of MoS2. We show that Fe-doping polarizes the spin of the conduction bands and introduces a localized Fe band underneath the conduction band. As a result, an additional orbital transition between the Mo 4d and Fe 3d states emerges, producing an orbital-phonon hybridized mode at 283 cm⁻¹. Our magnetic field dependent measurements demonstrate that this new mode carries 2.8 μ B effective phonon magnetic moment, which is comparable to that of the undoped MoS2. Moreover, even though a long-range magnetic order is absent in Fe-doped MoS2, the local magnetic moment of Fe modifies the nature of the spin fluctuation, producing monotonically increasing quasielastic scattering spectral weight as temperature decreases. Our results highlight two-dimensional dilute magnetic semiconductors synthesized by substitutional doping as a promising material platform to manipulate the phonon magnetic moment through orbital-phonon coupling.

Department

Department of Physics

Original Publication Date

9-19-2025

Object Description

1 PDF File

DOI of published version

10.1088/2053-1583/ae04fc

Repository

UNI ScholarWorks, Rod Library, University of Northern Iowa

Copyright

©2025 The Author(s)

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Language

en

File Format

application/pdf

Recommended Citation

Mustafa, Hussam; Ye, Gaihua; Nnokwe, Cynthia; Fang, Mengqi; Kandil, Mohamed; Al-Mahboob, Abdullah; Wu, Kai; Stollenwerk, Andrew James; Kidd, Timothy E.; Shand, Paul M.; Sadowski, Jerzy T.; Yang, Eui Hyeok; Zhou, Yinong; He, Rui; and Jin, Wencan, "Dilute Magnetic Impurity-induced Effective Phonon Magnetic Moment in Fe-Doped Monolayer MoS2" (2025). Faculty Publications. 6880.
https://scholarworks.uni.edu/facpub/6880