%0 Journal Article
%T Probing excitations in insulators via injection of spin-currents
%A Shubhayu Chatterjee
%A Subir Sachdev
%J Physics
%D 2015
%I arXiv
%R 10.1103/PhysRevB.92.165113
%X We propose a spin transport experiment to measure the low-energy excitations in insulators with spin degrees of freedom, with a focus on detecting ground states that lack magnetic order. A general formalism to compute the spin-current from a metal with a non-equilibrium distribution of spins to an insulator is developed. It is applied to insulating states with and without long range magnetic order, and salient features in the spin-conductance are noted.
%U http://arxiv.org/abs/1506.04740v2