Hybridization wave as the 'Hidden Order' in URu₂Si₂

الأصل · EN

A phenomenological model for the 'hidden order' transition in the heavy Fermion material URu₂Si₂ is introduced. The 'hidden order' is identified as an incommensurate, momentum-carrying hybridization between the light hole band and the heavy electron band. This modulated hybridization appears after a Fano hybridization at higher temperatures takes place. We focus on the hybridization wave as the order parameter in URu₂Si₂ and possibly other materials with similar band structures. The model is qualitatively consistent with numerous experimental results obtained from e.g. neutron scattering and scanning tunneling microscopy. Specifically, we find a gap-like feature in the density of states and the appearance of features at an incommensurate vector Q* 0.6 π/a₀. Finally, the model allows us to make various predictions which are amenable to current experiments.