Conversion between electron spin and microscopic atomic rotation

Abstract

We theoretically investigate the microscopic mechanism of conversion between the electron spin and the microscopic local rotation of atoms in crystals. In phonon modes with angular momenta, the atoms microscopically rotate around their equilibrium positions in crystals. In a simple toy model with phonons, we calculate the spin expectation value by using the adiabatic series expansion. We show that the time-averaged spin magnetization is generated by the microscopic local rotation of atoms via the spin-orbit interaction. On the other hand, in the system with a simple vibration of atoms, time-averaged spin magnetization becomes zero due to the time-reversal symmetry. Moreover, the magnitude of the time-averaged spin magnetization depends on the inverse of the difference of instantaneous eigenenergy, and we show that it becomes smaller in band insulators with a larger gap.

11 pages, 7 figures, to be published in Phys. Rev. Research

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Cited by in corpus (26)

• Giant effective magnetic fields from optically driven chiral phonons in 4$f$ paramagnets
• Magnetization control by angular momentum transfer from surface acoustic wave to ferromagnetic spin moments
• Phonon Magnetic Moment from Electronic Topological Magnetization
• Phonon angular momentum Hall effect
• Adiabatically Induced Orbital Magnetization
• Lattice dynamics with molecular Berry curvature: chiral optical phonons
• Electron magnetic moment of transient chiral phonons in KTaO${}_3$
• Chiral phonons in honeycomb sublattice of layered CoSn-like compounds
• Gate-tunable phonon magnetic moment in bilayer graphene
• Orbital Pumping Incorporating Both Orbital Angular Momentum and Position
• Phonon-induced geometric chirality
• Chiral-phonon-induced current in helical crystals
• Electric field-induced nonreciprocal spin current due to chiral phonons in chiral-structure superconductors
• Exciton-activated effective phonon magnetic moment in monolayer MoS2
• Conversion of chiral phonons into magnons in ferromagnets and antiferromagnets
• Theory of spin magnetization driven by chiral phonons
• Electron-Chiral Phonon Coupling, Crystal Angular Momentum, and Phonon Chirality
• Effects of Boundary on Orbital Magnetization for a Bilayer System with Different Chern Numbers
• Gauge theory of giant phonon magnetic moment in doped Dirac semimetals
• Magnetization generated by microwave-induced Rashba interaction
• Phonon Edelstein effect in chiral metals
• Spin-spin interaction mediated by chiral phonons
• Chiral magnon in ferromagnetic chiral crystals
• Dynamical Orbital Angular Momentum Induced by Circularly Polarized Phonons
• Supercurrent-induced phonon angular momentum
• Rotating effects on the Hall conductivity in a quantum dot