Giant effective magnetic moments of chiral phonons from orbit-lattice coupling
Swati Chaudhary, Dominik M. Juraschek, Martin Rodriguez-Vega, Gregory A. Fiete
Abstract
Circularly polarized lattice vibrations, also known as chiral phonons, carry angular momentum that leads to magnetic response. Recent experiments revealed responses far exceeding prior theoretical predictions within a classical framework. Here, the authors introduce a microscopic model which explains the large magnetic moments of chiral phonons in magnetic materials, resulting from orbit-lattice couplings that hybridize optical phonons with orbital electronic transitions.
Topics & Concepts
Condensed matter physicsLattice (music)Magnetic momentPhononPhysicsCoupling (piping)Materials scienceAcousticsComposite materialAtomic and Subatomic Physics ResearchQuantum, superfluid, helium dynamicsHigh-pressure geophysics and materials