A generation, propagation, and transfer of phonon angular momenta are examined on thermal transport in chiral insulative and diamagnetic crystals of α-quartz. We found that thermally-driven phonons carry chirality-dependent angular momenta in the quartz crystals and they could be extracted from the quartz as a spin signal. Namely, chirality-induced selectivity of phonon angular momenta is realized in the chiral quartz. We argue that chiral phonons available in chiral materials could be a key element in triggering or enhancing chirality-induced spin selectivity with robust spin polarization and long-range spin transport found in various chiral materials.
@article{arxiv.2401.17158,
title = {Chirality-Induced Selectivity of Phonon Angular Momenta in Chiral Quartz Crystals},
author = {Kazuki Ohe and Hiroaki Shishido and Masaki Kato and Shoyo Utsumi and Hiroyasu Matsuura and Yoshihiko Togawa},
journal= {arXiv preprint arXiv:2401.17158},
year = {2024}
}