Chiral phonons in polar LiNbO₃.

ABSTRACT: Quasiparticles describe collective excitations in many-body systems, and their symmetry classification is of fundamental importance for physical processes such as excited states, transport phenomena, and phase transitions. Recent studies have introduced chirality as an additional degree of freedom in condensed matter physics, leading to a range of novel phenomena. Among these, chiral phonons are of special interest because they carry angular momentum and therefore intrinsically break time reversal symmetry, which non-trivially bridges the spin system with the lattice. Here, we directly prove the presence of chiral phonons in a prototypical polar LiNbO₃ crystal. Our demonstration of chiral phonons in a ferroelectric enables in-situ electrical control of momentum-dependent "magnet

SUBMITTER: Ueda H 

PROVIDER: S-EPMC12780136 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature