Theory of induced quadrupolar order in tetragonal YbRu_{2}Ge_{2}

Tetsuya Takimoto, Peter Thalmeier

The tetragonal compound YbRu${}_2$Ge${}_2$ exhibits a non-magnetic transition at $T_0$=10.2K and a magnetic transition at $T_1$=6.5K in zero magnetic field. We present a model for…