Physics – Condensed Matter
Scientific paper
1992-08-19
Phys.Rev.Lett.69:3232-3235,1992
Physics
Condensed Matter
14 pages (RevTeX), 2 postscript figures available upon request
Scientific paper
10.1103/PhysRevLett.69.3232
Within a wide class of ferromagnetic and antiferromagnetic systems, quantum
tunneling of magnetization direction is spin-parity dependent: it vanishes for
magnetic particles with half-integer spin, but is allowed for integer spin. A
coherent-state path integral calculation shows that this topological effect
results from interference between tunneling paths.
DiVincenzo David P.
Grinstein Georges
Loss Daniel
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