Phys. Rev. Lett. 69, 3232 - 3235 (1992)Suppression of tunneling by interference in half-integer-spin particles |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1984: |
Daniel Loss, David P. DiVincenzo, and G. Grinstein
IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, New York 10598
Received 27 July 1992
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.
©1992 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v69/p3232
DOI: 10.1103/PhysRevLett.69.3232
PACS: 75.10.Jm, 03.65.Sq, 75.30.Gw, 75.60.Jp
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