Origin of Large Effective Phonon Magnetic Moments in Monolayer MoS₂.

ABSTRACT: Recent helicity-resolved magneto-Raman spectroscopy measurement demonstrates large effective phonon magnetic moments of ∼2.5 μ_B in monolayer MoS₂, highlighting resonant excitation of bright excitons as a feasible route to activate Γ-point circularly polarized phonons in transition metal dichalcogenides. However, a microscopic picture of this intriguing phenomenon remains lacking. In this work, we show that an orbital transition between the split conduction bands (Δ₀ = 4 meV) of MoS₂ couples to the doubly degenerate E″ phonon mode (Ω₀ = 33 meV), forming two hybridized states. Our phononic and electronic Raman scattering measurements capture these two states: (i) one with predominantly phonon contribution in the helicity-switched

SUBMITTER: Mustafa H 

PROVIDER: S-EPMC11948479 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature