Light Driven Spontaneous Phonon Chirality and Magnetization in Paramagnets

Abstract

Spin-phonon coupling enables the mutual manipulation of phonon and spin degrees of freedom in solids. In this study, we reveal the inherent nonlinearity within this coupling. Using a paramagnet as an illustration, we demonstrate the nonlinearity by unveiling spontaneous symmetry breaking under a periodic drive. The drive originates from linearly polarized light, respecting a mirror reflection symmetry of the system. However, this symmetry is spontaneously broken in the steady state, manifested in the emergence of coherent chiral phonons accompanied by a nonzero magnetization. We establish an analytical self-consistent equation to find the parameter regime where spontaneous symmetry breaking occurs. Furthermore, we estimate realistic parameters and discuss potential materials that could exhibit this behavior. Our findings shed light on the exploration of nonlinear phenomena in magnetic materials and present possibilities for on-demand control of magnetization.

arXiv comment5 pages, 4 figures

References in corpus (20)

• Electron-phonon interactions from first principles
• Physics and Applications of Laser Diode Chaos
• Nonlinear phononics: A new ultrafast route to lattice control
• An effective magnetic field from optically driven phonons
• Topological Nature of the Phonon Hall Effect
• Theory of nonlinear phononics for coherent light-control of solids
• Nonlinear light-matter interaction at terahertz frequencies
• Light-driven ultrafast phonomagnetism
• Polarizing an antiferromagnet by optical engineering of the crystal field
• Theory of Phonon Hall Effect in Paramagnetic Dielectrics
• Ultrafast phononic switching of magnetization
• Large effective magnetic fields from chiral phonons in rare-earth halides
• Terahertz-Light Driven Coupling of Antiferromagnetic Spins to Lattice
• Giant effective magnetic fields from optically driven chiral phonons in 4$f$ paramagnets
• Anomalous Hall effect for the phonon heat conductivity in paramagnetic dielectric
• Sum-frequency ionic Raman scattering
• Effects of intense optical phonon pumping on the structure and electronic properties of yttrium barium copper oxide
• Berryogenesis: self-induced Berry flux and spontaneous non-equilibrium magnetism
• Light-control of materials via nonlinear phononics
• Universal features of canonical phonon angular momentum without time-reversal symmetry

Cited by in corpus (5)

• Contrasting Light-Induced Spin Torque in Antiferromagnetic and Altermagnetic Systems
• Theory of spin magnetization driven by chiral phonons
• Gauge theory of giant phonon magnetic moment in doped Dirac semimetals
• Spin-spin interaction mediated by chiral phonons
• Pseudo-chiral phonon splitting from octupolar magnetic order