# Lattice dynamics with molecular Berry curvature: chiral optical phonons

@inproceedings{Saparov2021LatticeDW, title={Lattice dynamics with molecular Berry curvature: chiral optical phonons}, author={Daniyar Saparov and Bangguo Xiong and Yafei Ren and Q. Niu}, year={2021} }

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 study the effect of the molecular Berry curvature on the lattice dynamics in a system with broken time-reversal symmetry. The molecular Berry curvature is formulated based on the single-particle electronic Bloch states. It manifests as a non-local effective magnetic field in the equations of motion of…

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