Interference of Instanton Trajectories in Quantum Tunneling for Small Particles of Real Antiferromagnets

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dc.creatorIvanov, B. A.
dc.creatorKireev, V. E.
dc.date2005-01-10
dc.date.accessioned2026-07-07T03:03:07Z
dc.date.available2026-07-07T03:03:07Z
dc.descriptionFor a two-sublattice antiferromagnet the Lagrangian is constructed taking into account Berry phase whose form is matched to the quantum-mechanical Heisenberg Hamiltonian. Tunnel effects are analyzed taking into account the crystallographic symmetry and possible types of the Dzyaloshinskii-Moriya interaction. It is shown that, when the real magnetic symmetry and the Dzyaloshinskii-Moriya interaction are taken into consideration, the effects of a destructive instanton interference and the suppression of macroscopic quantum tunneling can play an essential role. It also may lead to a periodic dependence of the ground-state level splitting on the Dzyaloshinskii-Moriya interaction constant; the magnitude of this splitting is calculated.
dc.description12 pages, 1 table
dc.identifierhttps://arxiv.org/abs/cond-mat/0501185
dc.identifierhttp://arxiv.org/abs/cond-mat/0501185
dc.identifierJETP 94, 270 -- 282 (2002)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/25641
dc.subjectMesoscale and Nanoscale Physics
dc.titleInterference of Instanton Trajectories in Quantum Tunneling for Small Particles of Real Antiferromagnets
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