  Half-integer topological defects in polariton condensates can be regarded as
magnetic charges, with respect to built-in effective magnetic fields present in
microcavities. We show how an integer topological defect can be separated into
a pair of half-integer ones, paving the way towards flows of magnetic charges:
spin currents or magnetricity. We discuss the corresponding experimental
implementation within microwires (with half-solitons) and planar microcavities
(with half-vortices).
