publication . Article . Preprint . 2006

Berry-phase blockade in single-molecule magnets

Gonzalez, Gabriel; Leuenberger, Michael N.;
Open Access
  • Published: 23 Oct 2006 Journal: Physical Review Letters, volume 98 (issn: 0031-9007, eissn: 1079-7114, Copyright policy)
  • Publisher: American Physical Society (APS)
Abstract
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.
Subjects
arXiv: Condensed Matter::Mesoscopic Systems and Quantum Hall EffectNuclear ExperimentCondensed Matter::Strongly Correlated Electrons
free text keywords: General Physics and Astronomy, Quantum mechanics, Geometric phase, Coulomb blockade, Spin states, Hamiltonian (quantum mechanics), symbols.namesake, symbols, Magnetic field, Ground state, Spin-½, Physics, Spin polarization, Condensed matter physics, Condensed Matter - Mesoscale and Nanoscale Physics
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publication . Article . Preprint . 2006

Berry-phase blockade in single-molecule magnets

Gonzalez, Gabriel; Leuenberger, Michael N.;