Berry-phase blockade in single-molecule magnets

Details Berry-phase blockade in single-molecule magnets Berry-phase blockade in single-molecule magnets

2006-10-24

arxiv.org/abs/cond-mat/0610653v1

Phys. Rev. Lett. 98, 256804 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, Revtex 4, 4 EPS figures

Scientific paper

10.1103/PhysRevLett.98.256804

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.

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