1. A neuromorphic system comprising: a plurality of synapse blocks electrically connected to a plurality of neuron circuit blocks, the plurality of synapse blocks comprising a plurality of neuromorphic circuits arranged in a crossbar configuration, each neuromorphic circuit comprising: a field effect transistor in a diode configuration electrically connected to variable resistance material, the variable resistance material providing a programmable resistance value; a first junction electrically connected to the variable resistance material and an output of one or more of the neuron circuit blocks; and a second junction electrically connected to the field effect transistor and an input of one or more of the neuron circuit blocks.