Interference effect in the Landau-Zener tunneling of the antiferromagnetically coupled dimer of single-molecule magnets

2004/04/30 by D. A. Garanin
Materials Science · Physics and Astronomy · #Lanthanide and Transition Metal Complexes #Magnetism in coordination complexes #Quantum and electron transport phenomena #cond-mat.mtrl-sci #cond-mat.stat-mech

paper · pdf · doi:10.1103/physrevb.70.212403

published as Phys. Rev. B 70, 212403 (2004) · 4 PR pages, 2 figures

arxiv created 2004/04/30 · openalex publication_date 2004/12/08 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Two antiferromagnetically coupled tunneling systems compose a minimal model exhibiting the effect of the quantum-mechanical phase in the Landau-Zener effect. It is shown that the averaged staying probability oscillates versus the resonance shift between the two particles, as well as versus the sweeping rate. Such a resonance shift can be produced in Mn₄ dimers by the gradient of the magnetic field.

Related

• Quantum tunneling of two coupled single-molecular magnets
• Phase interference in antiferromagnetic quantum tunneling with an arbitrarily directed magnetic field
• Interference of Instanton Trajectories in Quantum Tunneling for Small Particles of Real Antiferromagnets
• Effect of Landau-Zener tunneling by the varying sweeping rate of external field
• Transverse magnetization and transient oscillations in the quantum tunneling of molecular magnets