Note on Angular Momentum of Phonons in Chiral Crystals

Abstract

Phonon angular momentum in chiral materials has been widely studied in spintronics and condensed matter physics. In chiral crystals, this is not the conserved quantity in contrast to the pseudo-angular momentum. To highlight this point and to understand the behavior of the angular momentum, we reexamined phonon dispersion theory based on the irreducible representation of helix and found the distinction of these angular momentum is originated from chirality.

2 pages, 2 figures

References in corpus (1)

• Chiral phonons: circularly polarized Raman spectroscopy and $\text{ab initio}$ calculations in a chiral crystal tellurium

Cited by in corpus (7)

• Unified description of electronic orderings and cross correlations by complete multipole representation
• Quantification of chirality based on electric toroidal monopole
• Emergence of chirality by multipole interconversion
• Electron-Chiral Phonon Coupling, Crystal Angular Momentum, and Phonon Chirality
• Theory of spin Seebeck effect activated by acoustic chiral phonons
• Description of molecular chirality and its analysis with high harmonic generation
• Microscopic Theory of Chiral-Phonon-Induced Orbital Selectivity in Helical Crystals