  We formulate the problem of electron transport through a single-molecule
magnet (SMM) in the Coulomb blockade regime taking into account topological
interference effects for the tunneling of the large spin of a SMM. The
interference originates from spin Berry phases associated with different
tunneling paths. We show that in the case of incoherent spin states it is
essential to place the SMM between oppositely spin-polarized source and drain
leads in order to detect the spin tunneling in the stationary current, which
exhibits topological zeros as a function of the transverse magnetic field.

Mesoscale and Nanoscale Physics