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arXiv · 1011.5315

Hybridization wave as the 'Hidden Order' in URu$_2$Si$_2$

Y. Dubi·Alexander V. Balatsky
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Abstract

A phenomenological model for the 'hidden order' transition in the heavy Fermion material URu$_2$Si$_2$ 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 URu$_2$Si$_2$ 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 $Q^*\sim 0.6 π/a_0$. Finally, the model allows us to make various predictions which are amenable to current experiments.

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Y. Dubi, Alexander V. Balatsky. 2011-02-16. Hybridization wave as the 'Hidden Order' in URu$_2$Si$_2$. https://doi.org/10.1103/physrevlett.106.086401

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