Phase interference in antiferromagnetic quantum tunneling with an arbitrarily directed magnetic field

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The quantum interference effects induced by the topological phase are studied analytically in biaxial antiferromagnets with an external magnetic field at an arbitrarily angle. This study provides a nontrivial generalization of the Kramers degeneracy for equivalent double-well system to coherently spin tunneling at ground states as well as low-lying excited states for antiferromagnetic system with asymmetric twin barriers. The spin-phase interference effects are found to depend on the orientation of the magnetic field distinctly.
10 pages, 3 figures

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Mesoscale and Nanoscale Physics, Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/17077

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0011487
 http://arxiv.org/abs/cond-mat/0011487

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arXiv