Phys. Rev. Lett. 98, 256804 (2007) [4 pages]Berry-Phase Blockade in Single-Molecule MagnetsReceived 24 October 2006; published 20 June 2007 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. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.256804
DOI:
10.1103/PhysRevLett.98.256804
PACS:
73.23.Hk, 03.65.Vf, 75.45.+j, 75.50.Xx
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