Measurements of strongly-anisotropic g-factors for spins in single quantum states
arXiv:cond-mat/0206423 · doi:10.1103/PhysRevLett.89.156802
Abstract
We have measured the full angular dependence, as a function of the direction of magnetic field, for the Zeeman splitting of individual energy states in copper nanoparticles. The g-factors for spin splitting are highly anisotropic, with angular variations as large as a factor of five. The angular dependence fits well to ellipsoids. Both the principal-axis directions and g-factor magnitudes vary between different energy levels within one nanoparticle. The variations agree quantitatively with random-matrix theory predictions which incorporate spin-orbit coupling.
4 pages, 3 figures, 2 in color