Fig. 5: First principle calculations of selective hybridization between magnons and chiral phonons in FePSe3. | Nature Communications

Fig. 5: First principle calculations of selective hybridization between magnons and chiral phonons in FePSe3.

From: Chirality selective magnon-phonon hybridization and magnon-induced chiral phonons in a layered zigzag antiferromagnet

Fig. 5: First principle calculations of selective hybridization between magnons and chiral phonons in FePSe3.The alternative text for this image may have been generated using AI.

a Schematic diagrams for atomic displacement of P1 and P2 phonons, the resulting chiral phonons (P±), and their selective hybridization with AFM magnons (Mα and Mβ). Calculated atomic displacement of Fe atoms of P1 and P2 phonons are shown on the left. The displacements of P1 and P2 modes exhibit out-of-phase motions between both inter- and intra-zigzag chain nearest neighbors. Their superposition gives two chiral phonons P+ and P−, which selectively couple with the two AFM magnons. b Schematic diagram of the magnon polaron branches under a magnetic field, resulting from two pairs of strongly coupled magnons and phonons given by (P+, Mα) and (P−, Mβ). c, Calculated magnon polarons dispersion as a function of magnetic field, which shows excellent agreement with optical results. d Calculated degree of circular polarization (DCP) of Raman spectra. The DCP of the magnon polarons is determined by a delicate interplay of the bare magnons and phonons, and the resulting interference of their Raman coefficients. e Calculated DCP spectra up to 30 T.

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