Larmor precession in strongly correlated itinerant electron systems

Larmor precession in strongly correlated itinerant electron systems

Blog Article

Abstract Many-electron systems undergo a collective Larmor precession in the presence of a magnetic field.In a korpskaft paramagnetic metal, the resulting spin wave provides insight into the correlation effects generated by the electron-electron interaction.Here, we use dynamical mean-field theory to investigate the collective Larmor precession in the strongly correlated regime, where dynamical correlation effects such as quasiparticle lifetimes and non-quasiparticle states are essential.We study the spin excitation spectrum, which includes a dispersive Larmor mode as well as electron-hole excitations that lead to Stoner damping.

We also extract the momentum-resolved damping of slow spin waves.The accurate theoretical description of these phenomena relies on the Ward identity, which guarantees a precise cancellation of self-energy and vertex here corrections at long wavelengths.Our findings pave the way towards a better understanding of spin wave damping in correlated materials.