Angular Momentum Conservation and Phonon Spin in Magnetic Insulators
Mesoscale and Nanoscale Physics
2020-03-04 v2
Abstract
We develop a microscopic theory of spin-lattice interactions in magnetic insulators, separating rigid-body rotations and the internal angular momentum, or spin, of the phonons, while conserving the total angular momentum. In the low-energy limit, the microscopic couplings are mapped onto experimentally accessible magnetoelastic constants. We show that the transient phonon spin contribution of the excited system can dominate over the magnon spin, leading to nontrivial Einstein-de Haas physics.
Keywords
Cite
@article{arxiv.1912.06616,
title = {Angular Momentum Conservation and Phonon Spin in Magnetic Insulators},
author = {Andreas Rückriegel and Simon Streib and Gerrit E. W. Bauer and Rembert A. Duine},
journal= {arXiv preprint arXiv:1912.06616},
year = {2020}
}
Comments
16 pages, 6 figures