Quantum phase interference (Berry phase) in single-molecule magnets of Mn12
W. Wernsdorfer, M. Soler, G. Christou, D. N. Hendrickson
Abstract
Magnetization measurements of a molecular clusters Mn12 with a spin ground state of S = 10 show resonance tunneling at avoided energy level crossings. The observed oscillations of the tunnel probability as a function of the magnetic field applied along the hard anisotropy axis are due to topological quantum phase interference of two tunnel paths of opposite windings. Mn12 is therefore the second molecular clusters presenting quantum phase interference.
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