Topological quenching of spin tunneling in Fe8-tacn molecules

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3 Scopus citations


A Berry phase in the path integral for spin gives rise to an interference effect in the tunneling of a biaxially symmetric spin Hamiltonian. As the magnetic field applied along a hard axis is varied, the tunnel splitting between the two lowest energy states oscillates, with field values where it is completely quenched. This Hamiltonian is realized in Fe8-tacn molecules, where these oscillations have just now been seen and provide, in fact, strong evidence for tunneling below 0.36 K in the first place.

Original languageEnglish (US)
Pages (from-to)269-270
Number of pages2
JournalPhysica B: Condensed Matter
Issue number1-4
StatePublished - May 11 2000
Event22nd International Conference on Low Temperature Physics (LT-22) - Helsinki, Finl
Duration: Aug 4 1999Aug 11 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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