



@article {1466,
	title = {Geometric-Phase-Effect Tunnel-Splitting Oscillations in Single-Molecule  Magnets with Fourth-Order Anisotropy Induced by Orthorhombic Distortion
},
	journal = {EPL (Europhysics Letters)},
	volume = {86},
	year = {2009},
	month = {2009/04/30},
	pages = {27002},
	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.
},
	doi = {10.1209/0295-5075/86/27002},
	url = {http://arxiv.org/abs/0809.2289v2},
	author = {Michael Foss-Feig and Jonathan R. Friedman}
}
