# Conversion between electron spin and microscopic atomic rotation

@article{Hamada2020ConversionBE, title={Conversion between electron spin and microscopic atomic rotation}, author={Masato Hamada and Shuichi Murakami}, journal={arXiv: Mesoscale and Nanoscale Physics}, year={2020} }

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…

## 12 Citations

### Magnetization control by angular momentum transfer from surface acoustic wave to ferromagnetic spin moments

- PhysicsNature communications
- 2021

It is demonstrated that the phonon angular momentum of surface acoustic wave can control the magnetization of a ferromagnetic Ni film by means of the phononic-to-electronic conversion of angular momentum in a Ni/LiNbO3 hybrid device.

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It is found that the traditional theory of magnetic moments for chiral phonons needs to be refined by introducing a k resolved Born effective charge, and another contribution from the phonon-modified electronic energy together with the momentum-space Berry curvature is identified.

### Adiabatically induced orbital magnetization

- Physics
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A semiclassical theory for the orbital magnetization of Bloch electrons due to adiabatic evolutions is proposed, providing a unified account of the orbital-magnetization pumping by periodic…

### Electron magnetic moment of chiral phonons

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High intensity THz lasers allow for the coherent excitation of individual phonon modes. The ultrafast control of emergent magnetism by means of phonons opens up new tuning mechanisms for functional…

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Under the Born-Oppenheimer approximation, the electronic ground state evolves adiabatically and can accumulate geometrical phases characterized by the molecular Berry curvature. In this work, we…

### Magnetization generated by microwave-induced Rashba interaction

- Physics
- 2020

We show that a controllable dc magnetization is accumulated in a junction comprising a quantum dot coupled to non-magnetic reservoirs if the junction is subjected to a time-dependent spin-orbit…

### Giant effective magnetic fields from optically driven chiral phonons in 4f paramagnets

- PhysicsPhysical Review Research
- 2022

We present a mechanism by which optically driven chiral phonon modes in rare-earth trihalides generate giant effective magnetic fields acting on the paramagnetic 4f spins. With cerium trichloride…

### Chiral phonons in the honeycomb sublattice of layered CoSn-like compounds

- PhysicsPhysical Review B
- 2021

Andrzej Ptok, ∗ Aksel Kobia lka, Ma lgorzata Sternik, Jan Lażewski, Pawe l T. Jochym, Andrzej M. Oleś, 4 Svetoslav Stankov, 6 and Przemys law Piekarz † Institute of Nuclear Physics, Polish Academy of…

### Interaction between surface acoustic waves and spin waves in a ferromagnetic thin film

- PhysicsJournal of Magnetism and Magnetic Materials
- 2021

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