QUANTUM TUNNELING AND PHASE-TRANSITIONS IN SPIN SYSTEMS WITH AN APPLIED MAGNETIC-FIELD

Authors
LEE SY MULLERKIRSTEN HJW PARK DK ZIMMERSCHIED F
Citation
Sy. Lee et al., QUANTUM TUNNELING AND PHASE-TRANSITIONS IN SPIN SYSTEMS WITH AN APPLIED MAGNETIC-FIELD, Physical review. B, Condensed matter, 58(9), 1998, pp. 5554-5562
Citations number
11
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
58
Issue
9
Year of publication
1998
Pages
5554 - 5562
Database
ISI
SICI code
0163-1829(1998)58:9<5554:QTAPIS>2.0.ZU;2-Q
Abstract
Transitions from classical to quantum behavior in a spin system with t wo degenerate ground states separated by twin energy barriers which ar e asymmetric due to an applied magnetic field are investigated. It is shown that these transitions can be interpreted as first- or second-or der phase transitions depending on the anisotropy and magnetic paramet ers defining the system in an effective Lagrangian description.