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

Phys. Rev. Lett. 69, 3232 – Published 30 November 1992
Daniel Loss, David P. DiVincenzo, and G. Grinstein


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.


  • Received 27 July 1992
  • Published in the issue dated 30 November 1992

© 1992 The American Physical Society

Authors & Affiliations

Daniel Loss, David P. DiVincenzo, and G. Grinstein

  • IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, New York 10598

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