A minimal model for “Hidden Order” in URu₂Si₂

Abstract

We present a bare bones description of a model which may lead to a Hidden Order Phase. We use a variational approximation and find that spin-rotational invariance, periodic translational invariance and gauge invariance are broken at low temperatures. The breaking of spin-rotational invariance leads to the development of an anisotropy in the susceptibility.

Keywords:

• Hidden Order
• Hund’s rule exchange
• magnetic nematicity
• URu2Si2

Acknowledgements

The work performed at Temple University was supported by a grant from the US Department of Energy, Office of Basic Energy Science, through the award DEFG02-84ER45872.