Geometric-Phase-Effect Tunnel-Splitting Oscillations in Single-Molecule Magnets with Fourth-Order Anisotropy Induced by Orthorhombic Distortion
Mesoscale and Nanoscale Physics
2009-04-30 v2 Materials Science
Strongly Correlated Electrons
Abstract
We analyze the interference between tunneling paths that occurs for a spin system with both fourth-order and second-order transverse anisotropy. Using an instanton approach, we find that as the strength of the second-order transverse anisotropy is increased, the tunnel splitting is modulated, with zeros occurring periodically. This effect results from the interference of four tunneling paths connecting easy-axis spin orientations and occurs in the absence of any magnetic field.
Keywords
Cite
@article{arxiv.0809.2289,
title = {Geometric-Phase-Effect Tunnel-Splitting Oscillations in Single-Molecule Magnets with Fourth-Order Anisotropy Induced by Orthorhombic Distortion},
author = {M. S. Foss-Feig and Jonathan R. Friedman},
journal= {arXiv preprint arXiv:0809.2289},
year = {2009}
}
Comments
6 pages, 5 eps figures. Version published in EPL. Expanded from v1: Appendix added, references added, 1 figure added, others modified cosmetically