Onset of non-linear IV transport with magnetic order in a Mott insulator*

We observe a non-linear voltage and current relation in the layered magnetic semiconductor EuMn2P2 when it approaches its ordering temperature. Such behavior is seen in materials that have charge density wave order, or those proximal to metal-insulator transitions such as the current switching of resistive states in magnetoresistive manganites. However, none of the preceding occurs in EuMn2P2. We observe a spin-order driven magnetic transport in the voltage and current relation. Our results in this work could reveal some unanswered questions of conduction and spins in the Mott Insulator model. We suggest that such phenomena could be exploited in non-linear antiferromagnetic insulators and we also provide a route to observing such behavior using chemical design principles.