Suppression of tunneling by interference in half-integer--spin particles

Details Suppression of tunneling by interference in half-integer--spin particles Suppression of tunneling by interference in half-integer--spin particles

1992-08-19

arxiv.org/abs/cond-mat/9208012v1

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.

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