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Abstract Realization of large effective phonon magnetic moment in monolayer MoS2has 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 4dand Fe 3dstates emerges, producing an orbital-phonon hybridized mode at 283 cm−1. Our magnetic field dependent measurements demonstrate that this new mode carries 2.8 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.more » « lessFree, publicly-accessible full text available September 19, 2026
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Nnokwe, Cynthia; Cunningham, Connor J; Liu, Wenhao; Ye, Gaihua; Nguyen, Tri; Wu, Kai; Hemesath, Colin; Sadler, Caden; Lukashev, Pavel; Zhai, Zixin; et al (, ACS Applied Nano Materials)Free, publicly-accessible full text available January 29, 2026
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