Emergent non-Fermi liquid phenomena in itinerant electron systems with multipolar local moments

Recent experiments on cubic heavy fermion systems with multipolar local moments offer a new avenue for the discovery of novel spin-orbital entangled quantum ground states. In this talk, we theoretically investigate the fate of the multipolar Kondo effect, where the local moment does not carry any dipole moment, but only quadrupolar and octupolar moments. Using perturbative renormalization group methods, we discover a number of non-Fermi liquid ground states, which are characterized by an absence of well-defined quasiparticles and singular power-law behaviours in physical properties. This work lays a novel ground for the identification of emergent non-Fermi liquid phases in many heavy fermion materials.