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

Rong Lu·Hui Pan·Jia-Lin Zhu·Bing-Lin Gu
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Abstract

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.

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Rong Lu, Hui Pan, Jia-Lin Zhu, Bing-Lin Gu. 2000-11-29. Phase interference in antiferromagnetic quantum tunneling with an arbitrarily directed magnetic field. https://arxiv.org/abs/cond-mat/0011487

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