Diabolical points in the magnetic spectrum of Fe_8 molecules

Abstract

The magnetic molecule Fe_8 has been predicted and observed to have a rich pattern of degeneracies in its spectrum as an external magnetic field is varied. These degeneracies have now been recognized to be diabolical points. This paper analyzes the diabolicity and all essential properties of this system using elementary perturbation theory. A variety of arguments is gievn to suggest that an earlier semiclassical result for a subset of these points may be exactly true for arbitrary spin

uses europhys.sty package; 3 embedded ps figures

References in corpus (1)

• Oscillatory Tunnel Splittings in Spin Systems: A Discrete Wentzel-Kramers-Brillouin Approach

Cited by in corpus (12)

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• Geometric phase effects in dynamics near conical intersections: Symmetry breaking and spatial localization
• Effect of local Coulomb interactions on the electronic structure and exchange interactions in Mn12 magnetic molecules
• Diabolical Points in Magnetic Molecules: An Exactly Solvable Model
• Quenched Spin Tunneling and Diabolical Points in Magnetic Molecules: II. Asymmetric Configurations
• Geometric-phase interference in a Mn_{12} single-molecule magnet with four-fold rotational symmetry
• Quenched Spin Tunneling and Diabolical Points in Magnetic Molecules: I. Symmetric Configurations
• Geometric-Phase-Effect Tunnel-Splitting Oscillations in Single-Molecule Magnets with Fourth-Order Anisotropy Induced by Orthorhombic Distortion
• Correlation effects in the electronic structure of Mn${}_4$ molecular magnet
• Intermediate spin, Schrödinger cat states and nano-magnets
• Molecular nanomagnets in ac magnetic field