Orbital magnetic moments of phonons

Abstract

In ionic materials, circularly polarized phonons carry orbital magnetic moments that arise from circular motions of the ions, and which interact with other magnetic moments or fields. Here, we calculate the orbital magnetic moments of phonons in 35 different materials using density functional theory, and we identify the factors that lead to, and materials that show, large responses. We compute the resulting macroscopic orbital magnetic moments that can be induced by the excitation of coherent phonons using mid-infrared laser pulses, and we evaluate the magnitudes of the phonon Zeeman effect in a strong magnetic field. Finally, we apply our formalism to chiral phonons, in which the motions of the ions are intrinsically circular. The zoology presented here may serve as a guide to finding materials for phonon and spin-phonon driven phenomena.

References in corpus (4)

• High-sensitivity diamond magnetometer with nanoscale resolution
• Scanning magnetic field microscope with a diamond single-spin sensor
• Optical momentum and angular momentum in complex media: From the Abraham-Minkowski debate to unusual properties of surface plasmon-polaritons
• Polarization Transport of Transverse Acoustic Waves: Berry Phase and Spin Hall Effect of Phonons

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• Gate-tunable phonon magnetic moment in bilayer graphene
• Phonon rotoelectric effect
• Sum-frequency excitation of coherent magnons
• Correlated Quantum Phenomena of Spin-Orbit Coupled Perovskite Oxide Heterostructures: Cases of SrRuO3 and SrIrO3-Based Artificial Superlattices
• Chiral-phonon-induced current in helical crystals
• Rotational $g$ factors and Lorentz forces of molecules and solids from density-functional perturbation theory
• Universal features of canonical phonon angular momentum without time-reversal symmetry
• Electrical Control over Phonon Polarization in Strained Graphene
• Electric field-induced nonreciprocal spin current due to chiral phonons in chiral-structure superconductors
• Exciton-activated effective phonon magnetic moment in monolayer MoS2
• Large Magnetic Moment in Flexoelectronic Silicon at Room Temperature
• Group theory study of the vibrational modes and magnetic order in the topological antiferromagnet MnBi${}_2$Te${}_4$
• Molecular Pseudorotation in Phthalocyanines as a Tool for Magnetic Field Control at the Nanoscale
• Oscillatory Hall effect from magnetoelectronic coupling in flexoelectronic silicon
• Optically- and thermally-driven huge lattice orbital and spin angular momenta from spinning fullerenes
• Evidence of magnetoelectronic electromagnon mediated transport in flexoelectronic heterostructures
• Interlayer charge transfer from contact electrification in conducting micro and nanoscale thin film heterostructures